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High Efficiency (15.8%) All-Polymer Solar Cells Enabled by a Regioregular Narrow Bandgap Polymer Acceptor
City Univ Hong Kong, Peoples R China.
City Univ Hong Kong, Peoples R China; Xian Univ Sci & Technol, Peoples R China.
Linköping University, Department of Physics, Chemistry and Biology, Electronic and photonic materials. Linköping University, Faculty of Science & Engineering.
Korea Univ, South Korea.
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2021 (English)In: Journal of the American Chemical Society, ISSN 0002-7863, E-ISSN 1520-5126, Vol. 143, no 7, p. 2665-2670Article in journal (Refereed) Published
Abstract [en]

Y Despite the significant progresses made in all-polymer solar cells (all-PSCs) recently, the relatively low short-circuit current density (J(sc)) and large energy loss are still quite difficult to overcome for further development. To address these challenges, we developed a new class of narrow-bandgap polymer acceptors incorporating a benzotriazole (BTz)-core fused-ring segment, named the PZT series. Compared to the commonly used benzothiadiazole (BT)-containing polymer PYT, the less electron-deficient BTz renders PZT derivatives with significantly red-shifted optical absorption and up-shifted energy levels, leading to simultaneously improved J(sc) and open-circuit voltage in the resultant all-PSCs. More importantly, a regioregular PZT (PZT-gamma) has been developed to achieve higher regiospecificity for avoiding the formation of isomers during polymerization. Benefiting from the more extended absorption, better backbone ordering, and more optimal blend morphology with donor component, PZT-gamma-based all-PSCs exhibit a record-high power conversion efficiency of 15.8% with a greatly enhanced J(sc) of 24.7 mA/cm(2) and a low energy loss of 0.51 eV.

Place, publisher, year, edition, pages
AMER CHEMICAL SOC , 2021. Vol. 143, no 7, p. 2665-2670
National Category
Polymer Chemistry
Identifiers
URN: urn:nbn:se:liu:diva-174111DOI: 10.1021/jacs.0c12527ISI: 000623246000007PubMedID: 33566603OAI: oai:DiVA.org:liu-174111DiVA, id: diva2:1537468
Note

Funding Agencies|APRC Grants of the City University of Hong Kong [9380086]; Innovation and Technology Bureau [ITS/497/18FP, GHP/021/18SZ]; Guangdong-Hong Kong-Macao joint laboratory of optoelectronic and magnetic materials [2019B121205002]; Research Grants Council of Hong KongHong Kong Research Grants Council [C5037-18G]; Guangdong Major Project of Basic and Applied Basic Research [2019B030302007]; Office of Naval ResearchOffice of Naval Research [N00014-20-1-2191]; Hong Kong Scholars Program [XJ2019-026]; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [21905225]; Science and Technology Program of Shanxi Province [2019JQ-244]; National Research Foundation (NRF) of KoreaNational Research Foundation of Korea [NRF2016M1A2A2940911, 2019R1A6A1A11044070]; Stiftelsen for Strategisk Forskning through the Future Research Leader program [FFL18-0322]

Available from: 2021-03-15 Created: 2021-03-15 Last updated: 2021-03-15

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