Functional Materials (FM) https://heika-research.de/en/research/functional-materials-fm en Synthesis and Nanostructuring of Heteroazulene-Materials for Thermoelectric Generators https://heika-research.de/en/research/functional-materials-fm/synthesis-and-nanostructuring-heteroazulene-materials <span class="field field--name-title field--type-string field--label-hidden">Synthesis and Nanostructuring of Heteroazulene-Materials for Thermoelectric Generators</span> <span class="field field--name-uid field--type-entity-reference field--label-hidden"><span lang="" about="/en/user/31" typeof="schema:Person" property="schema:name" datatype="" content="Maria Garcia Hernandez">Maria Garcia H…</span></span> <span class="field field--name-created field--type-created field--label-hidden">Thu, 08/30/2018 - 13:54</span> <div class="clearfix text-formatted field field--name-field-summary field--type-text-long field--label-hidden field__item"><p>The effectiveness of a thermoelectric material is given by ZT, the so-called figure of merit. The main challenge for enhancing ZT is enhancing the electrical conductivity and the Seebeck coefficient S, while reducing the thermal conductivity at the same time. For organic materials, however, increasing the conductivity relies on doping (p- and ntype). This has been performed for PEDOT:PSS and PEDOT:Tos in recent studies. It was found that there is a natural limit depending on the molecular orientation of the polymer chains meaning, that highly ordered structures can conduct more carrier than non-oriented ones.<br /> Thus, the orientation of polymer chains via an innovative method using hydrophilic / hydrophobic interactions during polymerization is provided. We can employ this method for PEDOT nanowires that can easily be processed and printed. However, novel materials are needed to build a unipolar device. Thus, we prepare as well p-doped but also ndoped polymers that stem from our already existing collaboration. Our key material here is 6Hcyclohepta[c]thiophen-6-one (CETO), since it is easily achievable through condensation reactions, upscale-able for commercialization and chemically attractive for functionalization. Its structural properties (i.e. dipole of 7.6 D) and electrical conductivity when doped (p- or n-type) show great promise for such a device that will double the efficiency of state of the art thermoelectric generators. </p></div> <div class="field field--name-field-research-bridges field--type-entity-reference field--label-above"> <div class="field__label">Research bridges</div> <div class="field__items"> <div class="field__item"><a href="/en/research/functional-materials-fm" hreflang="en">Functional Materials (FM)</a></div> </div> </div> <div class="field field--name-field-start-date field--type-datetime field--label-above"> <div class="field__label">Start date</div> <div class="field__item"> <time datetime="2018-01-01T12:00:00Z" class="datetime">01/01/2018</time> </div> </div> <div class="field field--name-field-end-date field--type-datetime field--label-hidden field__item"><time datetime="2018-12-31T12:00:00Z" class="datetime">12/31/2018</time> </div> <div class="field field--name-field-contact-person field--type-entity-reference field--label-above"> <div class="field__label"><h3>Project management</h3></div> <div class="field__items"> <article data-history-node-id="120" role="article" about="/index.php/en/prof-dr-uwe-bunz" class="node node--type-people-profile node--view-mode-teaser"> <div class="node__content"> <div class="content-container"> <div class="header-container"> <h2> <a href="/index.php/en/prof-dr-uwe-bunz" rel="bookmark"><span class="field field--name-title field--type-string field--label-hidden">Prof. Dr. Uwe Bunz</span> </a> </h2> </div> <div class="field field--name-field-institute field--type-string field--label-hidden field__item">Institute of Organic Chemistry</div> <div class="field field--name-field-facility field--type-string field--label-hidden field__item">University of Heidelberg</div> <div class="field field--name-field-link field--type-link field--label-hidden field__item"><a href="https://www.uni-heidelberg.de/fakultaeten/chemgeo/oci/akbunz/bunz.html">Uwe Bunz</a></div> </div> </div> </article> <article data-history-node-id="101" role="article" about="/index.php/en/prof-dr-rer-nat-uli-lemmer" class="node node--type-people-profile node--view-mode-teaser"> <div class="node__content"> <div class="field field--name-field-profile-picture field--type-entity-reference field--label-hidden field__item"><article class="media media--type-image media--view-mode-portrait-image"> <div class="field field--name-field-media-image field--type-image field--label-hidden field__item"> <picture> <!--[if IE 9]><video style="display: none;"><![endif]--> <source srcset="/sites/default/files/styles/portrait_1x_tablet/public/2018-08/BD_member_ULemmer.jpg?h=f8b064a3&amp;itok=7ydievPy 1x, /sites/default/files/styles/portrait_2x_tablet/public/2018-08/BD_member_ULemmer.jpg?h=f8b064a3&amp;itok=HZFbfnS7 2x" media="all and (min-width: 769px)" type="image/jpeg"/> <source srcset="/sites/default/files/styles/portrait_1x_tablet/public/2018-08/BD_member_ULemmer.jpg?h=f8b064a3&amp;itok=7ydievPy 1x, /sites/default/files/styles/portrait_2x_tablet/public/2018-08/BD_member_ULemmer.jpg?h=f8b064a3&amp;itok=HZFbfnS7 2x" media="all and (min-width: 481px) and (max-width: 768px)" type="image/jpeg"/> <source srcset="/sites/default/files/styles/portrait_1x_phone/public/2018-08/BD_member_ULemmer.jpg?h=f8b064a3&amp;itok=LvSEEzCw 1x, /sites/default/files/styles/portrait_1x_tablet/public/2018-08/BD_member_ULemmer.jpg?h=f8b064a3&amp;itok=7ydievPy 2x" media="all and (max-width: 480px)" type="image/jpeg"/> <!--[if IE 9]></video><![endif]--> <img src="/sites/default/files/styles/portrait_1x_tablet/public/2018-08/BD_member_ULemmer.jpg?h=f8b064a3&amp;itok=7ydievPy" alt="Prof. Dr. Uli Lemmer" typeof="foaf:Image" /> </picture> </div> </article> </div> <div class="content-container"> <div class="header-container"> <h2> <a href="/index.php/en/prof-dr-rer-nat-uli-lemmer" rel="bookmark"><span class="field field--name-title field--type-string field--label-hidden">Prof. Dr. rer. nat Uli Lemmer</span> </a> </h2> </div> <div class="field field--name-field-function-1 field--type-string field--label-hidden field__item">Director Research Bridge FM</div> <div class="field field--name-field-institute field--type-string field--label-hidden field__item">Light Technology Institute</div> <div class="field field--name-field-facility field--type-string field--label-hidden field__item">Karlsruhe Institute of Technology</div> <div class="field field--name-field-link field--type-link field--label-hidden field__item"><a href="http://www.lti.kit.edu/english/mitarbeiter_lemmer.php">Uli Lemmer</a></div> </div> </div> </article> </div> </div> Thu, 30 Aug 2018 11:54:09 +0000 Maria Garcia Hernandez 136 at https://heika-research.de Nanoparticles in Porous organic coordination compounds: from functional molecules to functional materials https://heika-research.de/en/research/functional-materials-fm/nanoparticles-porous-organic-coordination-compounds-functional <span class="field field--name-title field--type-string field--label-hidden">Nanoparticles in Porous organic coordination compounds: from functional molecules to functional materials</span> <span class="field field--name-uid field--type-entity-reference field--label-hidden"><span lang="" about="/en/user/31" typeof="schema:Person" property="schema:name" datatype="" content="Maria Garcia Hernandez">Maria Garcia H…</span></span> <span class="field field--name-created field--type-created field--label-hidden">Thu, 08/30/2018 - 13:56</span> <div class="clearfix text-formatted field field--name-field-summary field--type-text-long field--label-hidden field__item"><p>Lately there has been a lot of effort to designing MOF building block materials with improved electric conductivity, towards their application in electronic devices. We propose to use a similar approach using porous organic cage crystals (POCs) which additionally offer an intrinsic pore structure and can also be used to grow oriented layers of a porous framework on different substrates of gold or silicon. Due to their stability in solution they can easily be processed by various deposition methods including the layer-by-layer technique that is successfully used for the deposition of SURMOFs. The aim is to enhance the electric conductivity post-synthetically by embedding conducting metal nanoparticles in the POCs’ pores. Our preliminary work on SURMOFs using a similar approach suggests that the electric conductivity could significantly be improved. Embedding electrically conductive metal nanoclusters in the pores of POCs makes these materials good candidates for the use as organic electronics towards device application. </p></div> <div class="field field--name-field-research-bridges field--type-entity-reference field--label-above"> <div class="field__label">Research bridges</div> <div class="field__items"> <div class="field__item"><a href="/en/research/functional-materials-fm" hreflang="en">Functional Materials (FM)</a></div> </div> </div> <div class="field field--name-field-start-date field--type-datetime field--label-above"> <div class="field__label">Start date</div> <div class="field__item"> <time datetime="2018-01-01T12:00:00Z" class="datetime">01/01/2018</time> </div> </div> <div class="field field--name-field-end-date field--type-datetime field--label-hidden field__item"><time datetime="2018-12-31T12:00:00Z" class="datetime">12/31/2018</time> </div> <div class="field field--name-field-contact-person field--type-entity-reference field--label-above"> <div class="field__label"><h3>Project management</h3></div> <div class="field__items"> <article data-history-node-id="102" role="article" about="/index.php/en/prof-dr-michael-mastalerz" class="node node--type-people-profile node--view-mode-teaser"> <div class="node__content"> <div class="field field--name-field-profile-picture field--type-entity-reference field--label-hidden field__item"><article class="media media--type-image media--view-mode-portrait-image"> <div class="field field--name-field-media-image field--type-image field--label-hidden field__item"> <picture> <!--[if IE 9]><video style="display: none;"><![endif]--> <source srcset="/sites/default/files/styles/portrait_1x_tablet/public/2018-08/BD_member_MMastalerz_0.jpg?h=46ed6214&amp;itok=aUNTw3_7 1x, /sites/default/files/styles/portrait_2x_tablet/public/2018-08/BD_member_MMastalerz_0.jpg?h=46ed6214&amp;itok=NdR8ddyZ 2x" media="all and (min-width: 769px)" type="image/jpeg"/> <source srcset="/sites/default/files/styles/portrait_1x_tablet/public/2018-08/BD_member_MMastalerz_0.jpg?h=46ed6214&amp;itok=aUNTw3_7 1x, /sites/default/files/styles/portrait_2x_tablet/public/2018-08/BD_member_MMastalerz_0.jpg?h=46ed6214&amp;itok=NdR8ddyZ 2x" media="all and (min-width: 481px) and (max-width: 768px)" type="image/jpeg"/> <source srcset="/sites/default/files/styles/portrait_1x_phone/public/2018-08/BD_member_MMastalerz_0.jpg?h=46ed6214&amp;itok=oyl0hwl2 1x, /sites/default/files/styles/portrait_1x_tablet/public/2018-08/BD_member_MMastalerz_0.jpg?h=46ed6214&amp;itok=aUNTw3_7 2x" media="all and (max-width: 480px)" type="image/jpeg"/> <!--[if IE 9]></video><![endif]--> <img src="/sites/default/files/styles/portrait_1x_tablet/public/2018-08/BD_member_MMastalerz_0.jpg?h=46ed6214&amp;itok=aUNTw3_7" alt="Prof. Dr. Michael Mastalerz" typeof="foaf:Image" /> </picture> </div> </article> </div> <div class="content-container"> <div class="header-container"> <h2> <a href="/index.php/en/prof-dr-michael-mastalerz" rel="bookmark"><span class="field field--name-title field--type-string field--label-hidden">Prof. Dr. Michael Mastalerz</span> </a> </h2> </div> <div class="field field--name-field-function-1 field--type-string field--label-hidden field__item">Director Research Bridge FM</div> <div class="field field--name-field-institute field--type-string field--label-hidden field__item">Institute of Organic Chemistry</div> <div class="field field--name-field-facility field--type-string field--label-hidden field__item">Heidelberg University</div> <div class="field field--name-field-link field--type-link field--label-hidden field__item"><a href="https://www.uni-heidelberg.de/fakultaeten/chemgeo/oci/mastalerz/mastalerz.html">Michael Mastalerz</a></div> </div> </div> </article> <article data-history-node-id="188" role="article" about="/en/dr-julia-rinck-0" class="node node--type-people-profile node--view-mode-teaser"> <div class="node__content"> <div class="field field--name-field-profile-picture field--type-entity-reference field--label-hidden field__item"><article class="media media--type-image media--view-mode-portrait-image"> <div class="field field--name-field-media-image field--type-image field--label-hidden field__item"> <picture> <!--[if IE 9]><video style="display: none;"><![endif]--> <source srcset="/sites/default/files/styles/portrait_1x_tablet/public/2018-09/Rinck_Julia_Pic.JPG?h=cdf08b7e&amp;itok=Fkqp1G0Z 1x, /sites/default/files/styles/portrait_2x_tablet/public/2018-09/Rinck_Julia_Pic.JPG?h=cdf08b7e&amp;itok=Y3r8r6eL 2x" media="all and (min-width: 769px)" type="image/jpeg"/> <source srcset="/sites/default/files/styles/portrait_1x_tablet/public/2018-09/Rinck_Julia_Pic.JPG?h=cdf08b7e&amp;itok=Fkqp1G0Z 1x, /sites/default/files/styles/portrait_2x_tablet/public/2018-09/Rinck_Julia_Pic.JPG?h=cdf08b7e&amp;itok=Y3r8r6eL 2x" media="all and (min-width: 481px) and (max-width: 768px)" type="image/jpeg"/> <source srcset="/sites/default/files/styles/portrait_1x_phone/public/2018-09/Rinck_Julia_Pic.JPG?h=cdf08b7e&amp;itok=RUPcNOx0 1x, /sites/default/files/styles/portrait_1x_tablet/public/2018-09/Rinck_Julia_Pic.JPG?h=cdf08b7e&amp;itok=Fkqp1G0Z 2x" media="all and (max-width: 480px)" type="image/jpeg"/> <!--[if IE 9]></video><![endif]--> <img src="/sites/default/files/styles/portrait_1x_tablet/public/2018-09/Rinck_Julia_Pic.JPG?h=cdf08b7e&amp;itok=Fkqp1G0Z" alt="Dr. Julia Rinck" typeof="foaf:Image" /> </picture> </div> </article> </div> <div class="content-container"> <div class="header-container"> <h2> <a href="/en/dr-julia-rinck-0" rel="bookmark"><span class="field field--name-title field--type-string field--label-hidden">Dr. Julia Rinck</span> </a> </h2> </div> <div class="field field--name-field-institute field--type-string field--label-hidden field__item">Institute of Functional Interfaces</div> <div class="field field--name-field-facility field--type-string field--label-hidden field__item">Karlsruhe Institute of Technology</div> <div class="field field--name-field-link field--type-link field--label-hidden field__item"><a href="https://www.ifg.kit.edu/english/21_5611.php">Julia Rinck</a></div> </div> </div> </article> </div> </div> Thu, 30 Aug 2018 11:56:35 +0000 Maria Garcia Hernandez 137 at https://heika-research.de Towards High Yield PERovskite solar cells by inkjet printing <HYPER> https://heika-research.de/en/research/functional-materials-fm/towards-high-yield-perovskite-solar-cells-inkjet-printing <span class="field field--name-title field--type-string field--label-hidden">Towards High Yield PERovskite solar cells by inkjet printing &lt;HYPER&gt;</span> <span class="field field--name-uid field--type-entity-reference field--label-hidden"><span lang="" about="/en/user/32" typeof="schema:Person" property="schema:name" datatype="">Regine Kleber</span></span> <span class="field field--name-created field--type-created field--label-hidden">Mon, 11/12/2018 - 17:08</span> <div class="clearfix text-formatted field field--name-field-summary field--type-text-long field--label-hidden field__item"><p><span><span><span><span><span lang="EN-GB" xml:lang="EN-GB" xml:lang="EN-GB">Perovskite solar cells have revolutionised the field of emerging photovoltaic technologies by demonstrating power conversion efficiencies surpassing 22% in just a few years. One of the key issues hindering further progress in the field and the incorporation of these devices into industrial applications is the notorious lack of reproducibility of perovskite devices experienced by researchers worldwide. This issue has resulted in the routine practice of reporting photovoltaic parameter histograms showing wide spread of performance for identically fabricated devices. Recently, we have identified this lack of reproducibility to be linked to large-scale compositional and electronic inhomogeneities of spin-coated perovskite active layers. This, and the need for scalability for future fabrication of perovskite solar cells, highlights the need to focus on the development of alternative deposition methods for perovskite solar cells, such as inkjet printing. In this project, we aim to utilize the inkjet printing deposition method for fabrication of high yield and high performance perovskite solar cells. The project &lt;HYPER&gt; is based on the complementary areas of expertise of the Heidelberg and KIT PIs and will combine inkjet printing of perovskite layers, advanced spectroscopic characterisation and device fabrication. Specifically, we will characterise the compositional and electronic homogeneity of the inkjet printed perovskite layers by x-ray and ultraviolet photoemission spectroscopy mapping experiments and fine tune the deposition parameters for optimal layer quality and homogeneity. The optimal layers will be utilized as active layer in perovskite solar cells, which we will show to exhibit superior reproducibility when compared to reference spin-coated layers. Finally, we will apply the results of the project to large area modules that will exemplify the scalability of inkjet printing and bring perovskite solar cells closer to industrial application.</span></span></span></span></span></p></div> <div class="field field--name-field-research-bridges field--type-entity-reference field--label-above"> <div class="field__label">Research bridges</div> <div class="field__items"> <div class="field__item"><a href="/en/research/functional-materials-fm" hreflang="en">Functional Materials (FM)</a></div> </div> </div> <div class="field field--name-field-start-date field--type-datetime field--label-above"> <div class="field__label">Start date</div> <div class="field__item"> <time datetime="2019-01-01T12:00:00Z" class="datetime">01/01/2019</time> </div> </div> <div class="field field--name-field-end-date field--type-datetime field--label-hidden field__item"><time datetime="2019-12-31T12:00:00Z" class="datetime">12/31/2019</time> </div> <div class="field field--name-field-contact-person field--type-entity-reference field--label-above"> <div class="field__label"><h3>Project management</h3></div> <div class="field__items"> <article data-history-node-id="195" role="article" about="/en/jun-prof-dr-yana-vaynzof" class="node node--type-people-profile node--view-mode-teaser"> <div class="node__content"> <div class="content-container"> <div class="header-container"> <h2> <a href="/en/jun-prof-dr-yana-vaynzof" rel="bookmark"><span class="field field--name-title field--type-string field--label-hidden">Jun.-Prof. Dr. Yana Vaynzof</span> </a> </h2> </div> <div class="field field--name-field-institute field--type-string field--label-hidden field__item">Centre for Advanced Materials (CAM)</div> <div class="field field--name-field-facility field--type-string field--label-hidden field__item">Heidelberg University</div> <div class="field field--name-field-link field--type-link field--label-hidden field__item"><a href="http://www.cam.uni-heidelberg.de/ag_vaynzof/">Research Group Vaynzof</a></div> </div> </div> </article> <article data-history-node-id="196" role="article" about="/en/dr-ulrich-wilhelm-paetzold" class="node node--type-people-profile node--view-mode-teaser"> <div class="node__content"> <div class="content-container"> <div class="header-container"> <h2> <a href="/en/dr-ulrich-wilhelm-paetzold" rel="bookmark"><span class="field field--name-title field--type-string field--label-hidden">Dr. Ulrich Wilhelm Paetzold</span> </a> </h2> </div> <div class="field field--name-field-institute field--type-string field--label-hidden field__item">Institute of Microstructure Technology (IMT)</div> <div class="field field--name-field-facility field--type-string field--label-hidden field__item">Karlsruhe Institute of Technolgoy</div> <div class="field field--name-field-link field--type-link field--label-hidden field__item"><a href="https://www.imt.kit.edu/paetzold.php">Research Group Paetzold</a></div> </div> </div> </article> </div> </div> Mon, 12 Nov 2018 16:08:24 +0000 Regine Kleber 209 at https://heika-research.de