{"id":2381,"date":"2023-08-09T14:39:26","date_gmt":"2023-08-09T06:39:26","guid":{"rendered":"https:\/\/diau08.lab.nycu.edu.tw\/?p=2381"},"modified":"2023-11-29T15:33:22","modified_gmt":"2023-11-29T07:33:22","slug":"2023%e7%a0%94%e7%a9%b6%e6%88%90%e6%9e%9c","status":"publish","type":"post","link":"https:\/\/diau08.lab.nycu.edu.tw\/en\/2023\/08\/2381\/","title":{"rendered":"2023 Research Results"},"content":{"rendered":"
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Dopant\u2010Free Pyrrolopyrrole\u2010based (PPr) Polymeric Hole\u2010Transporting Materials for Efficient Tin\u2010based Perovskite Solar Cells with Stability over 6000 h<\/strong><\/h4>\n\n\n\n
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A new set of pyrrolopyrrole-based (PPr) polymers incorporated with thioalkylated\/alkylated bithiophene (SBT\/BT) were synthesized and explored as hole-transporting materials (HTMs) for Sn-based perovskite solar cells (TPSCs). Three bithiophenyl spacers bearing the thioalkylated hexyl (SBT-6), thioalkylated tetradecyl (SBT-14), and tetradecyl (BT-14) chains were utilized to examine the effect of the alkyl chain lengths. Among them, the TPSCs were fabricated using PPr-SBT-14 as HTMs through a two-step approach by attaining a power conversion efficiency (PCE) of 7.6% with a remarkable long-term stability beyond 6000 hours, which has not been reported elsewhere for a non-PEDOT:PSS-based TPSC. The highly planar structure, strong intramolecular S(alkyl)\u00b7\u00b7\u00b7S(thiophene) interactions, and extended \u03c0-conjugation of SBT made the PPr-SBT-14 device outperform the standard P3HT and other devices. The longer thio-tetradecyl chain in SBT-14 restricts the molecular rotation and strongly affects the molecular conformation, solubility, and film wettability over other polymers. Thus, the present study makes a promising dopant-free polymeric HTM model for the future design of highly efficient and stable TPSCs.<\/p>\n\n\n\n

Chun-Hsiao Kuan, Rajendiran Balasaravanan, Shih-Min Hsu, Jen-Shyang Ni, Yi-Tai Tsai, Zhong-Xiang Zhang, Ming-Chou Chen* and Eric Wei-Guang Diau,*,\u201d Dopant-Free Pyrrolopyrrole-Based (PPr) Polymeric Hole-Transporting Materials for Efficient Tin-Based Perovskite Solar Cells with Stability Over 6000 h\u201d, Adv. Mater., <\/em>35<\/strong>, <\/em>2300681 (2023).<\/p>\n\n\n\n

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Triphenylamine (TPA)-Functionalized Structural Isomeric Polythiophenes as Dopant Free Hole-Transporting Materials for Tin Perovskite Solar Cells<\/strong><\/h4>\n\n\n\n
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A new series of triphenylamine (TPA)-functionalized isomeric polythiophenes are developed as hole transporting materials (HTM) for inverted tin-based perovskite solar cells (TPSCs). Bithiophene (BT) was first functionalized with two TPA at 3 and 5 positions to give two structural isomeric compounds (3BT2D and 5BT2D). The functionalized BT2Ds were then coupled with SBT-14\/BT-14 to produce structural isomeric polythiophenes. The TPA-functionalized polymers based TPSCs exhibit enhance operational stability and efficiency. The long thiotetradecyl chain in SBT-14 with intramolecular S(alkyl)\u2219\u2219\u2219S(thio) interactions restricts the molecular rotation and has a strong impact on the molecular solubility and wettability of the film during device fabrication. Among all the polymers studied, TPSCs fabricated with 3-SBT-BT2D polymer exhibit the highest hole mobility as well as the slowest charge recombination and achieve the highest power conversion efficiency (PCE) of 8.6%, with a great long-term stability for the performance retaining ~90% of its initial values for shelf storage over 4000 h, which is the best efficiency for non-PEDOT:PSS-based TPSCs ever reported.<\/p>\n\n\n\n

Rajendiran Balasaravanan, Chun-Hsiao Kuan, Shih-Min Hsu, En-Chi Chang, Yu-Cheng Chen, Yi-Tai Tsai, Meng-Li Jhou, Shueh-Lin Yau, Cheng-Liang Liu, Ming-Chou Chen* and Eric Wei-Guang Diau*, \u201cTriphenylamine (TPA)-Functionalized Structural Isomeric Polythiophenes as Dopant Free Hole-Transporting Materials for Tin Perovskite Solar Cells\u201d, Adv. Energy Mater., <\/em>13<\/strong>, <\/em>2302047 (2023).<\/p>","protected":false},"excerpt":{"rendered":"

\u4ee5\u7121\u53c3\u96dc\u5291PPr\u805a\u5408\u7269\u4f5c\u70ba\u932b\u57fa\u9223\u9226\u7926\u592a\u967d\u80fd\u96fb\u6c60\u96fb\u6d1e<\/p>","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11],"tags":[],"class_list":["post-2381","post","type-post","status-publish","format-standard","hentry","category-research-results"],"_links":{"self":[{"href":"https:\/\/diau08.lab.nycu.edu.tw\/en\/wp-json\/wp\/v2\/posts\/2381","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/diau08.lab.nycu.edu.tw\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/diau08.lab.nycu.edu.tw\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/diau08.lab.nycu.edu.tw\/en\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/diau08.lab.nycu.edu.tw\/en\/wp-json\/wp\/v2\/comments?post=2381"}],"version-history":[{"count":6,"href":"https:\/\/diau08.lab.nycu.edu.tw\/en\/wp-json\/wp\/v2\/posts\/2381\/revisions"}],"predecessor-version":[{"id":2540,"href":"https:\/\/diau08.lab.nycu.edu.tw\/en\/wp-json\/wp\/v2\/posts\/2381\/revisions\/2540"}],"wp:attachment":[{"href":"https:\/\/diau08.lab.nycu.edu.tw\/en\/wp-json\/wp\/v2\/media?parent=2381"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/diau08.lab.nycu.edu.tw\/en\/wp-json\/wp\/v2\/categories?post=2381"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/diau08.lab.nycu.edu.tw\/en\/wp-json\/wp\/v2\/tags?post=2381"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}