气候变化领域集成服务门户(CCPortal): A novel wide-bandgap small molecule donor for high efficiency all-small-molecule organic solar cells with small non-radiative energy losses

CCPortal

DOI	10.1039/c9ee04199k
	A novel wide-bandgap small molecule donor for high efficiency all-small-molecule organic solar cells with small non-radiative energy losses
	Wang Y.; Wang Y.; Zhu L.; Liu H.; Fang J.; Guo X.; Liu F.; Tang Z.; Zhang M.; Li Y.
发表日期	2020
ISSN	17545692
起始页码	1309
结束页码	1317
卷号	13 期号:5
英文摘要	In this work, a wide-bandgap small molecule donor, BTTzR, that incorporates the electron-donating alkylthienyl-substituted benzo[1,2-b:4,5-b']dithiophene (BDT-T) unit and the electron-deficient thiazolo[5,4-d]thiazole (TTz) unit as the building block units is designed and synthesized. BTTzR exhibits strong absorption in the wavelength range of 400-650 nm with a wide optical bandgap of 1.88 eV, a low-lying highest occupied molecular orbital (HOMO) energy level of -5.58 eV, and an ordered molecular orientation and packing. Hence, optimized all-small-molecule organic solar cells (SM-OSCs) based on BTTzR as a donor and Y6 as an acceptor achieve an outstanding power conversion efficiency (PCE) of 13.9%, which is among the highest values reported in the literature to date. More importantly, the devices exhibit a very small non-radiative energy loss of 0.18 eV, which is similar to those of inorganic solar cells. These results indicate that BTTzR is a promising small molecule donor material for SM-OSC application and provide new insight into the design of photovoltaic materials to reduce the non-radiative energy loss in the OSCs. © The Royal Society 2020 of Chemistry.
英文关键词	Conversion efficiency; Energy dissipation; Energy gap; Molecular orbitals; Molecular orientation; Molecules; Synthesis (chemical); Electron-deficient; Highest occupied molecular orbital energy levels; Inorganic solar cells; Nonradiative energy; Photovoltaic materials; Power conversion efficiencies; Small-molecule organic solar cells; Strong absorptions; Organic solar cells; detection method; fuel cell; molecular analysis; solar radiation
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/189719
作者单位	Laboratory of Advanced Optoelectronic Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, China; China Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China; Center for Advanced Low-dimension Materials, State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, China; Beijing National Laboratory for Molecular Sciences, Cas Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
推荐引用方式 GB/T 7714	Wang Y.,Wang Y.,Zhu L.,et al. A novel wide-bandgap small molecule donor for high efficiency all-small-molecule organic solar cells with small non-radiative energy losses[J],2020,13(5).
APA	Wang Y..,Wang Y..,Zhu L..,Liu H..,Fang J..,...&Li Y..(2020).A novel wide-bandgap small molecule donor for high efficiency all-small-molecule organic solar cells with small non-radiative energy losses.Energy & Environmental Science,13(5).
MLA	Wang Y.,et al."A novel wide-bandgap small molecule donor for high efficiency all-small-molecule organic solar cells with small non-radiative energy losses".Energy & Environmental Science 13.5(2020).