Ternary blend strategy in benzotriazole-based organic photovoltaics for indoor application  

作　　者：Yinglong Bai Runnan Yu Yiming Bai Erjun Zhou Tasawar Hayat Ahmed Alsaedi Zhan'ao Tan 

机构地区：[1]State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources,North China Electric Power University,Beijing,102206,China [2]Beijing Advanced Innovation Center for Soft Matter Science and Engineering,Beijing University of Chemical Technology,Beijing,100029,China [3]CAS Key Laboratory of Nanosystem and Hierarchical Fabrication,CAS Center for Excellence in Nanoscience,National Center for Nanoscience and Technology,Beijing,100190,China [4]NAAM Research Group,Faculty of Science,King Abdulaziz University,Jeddah 21589,Saudi Arabia

出　　处：《Green Energy & Environment》2021年第6期920-928,共9页绿色能源与环境（英文版）

基　　金：supported by the National Natural Science Foundation of China(51873007,51961165102,and 21835006);the Fundamental Research Funds for the Central Universities in China(2019MS025,2018MS032,2017MS027,2017XS084)。

摘　　要：Organic photovoltaics(OPVs)suitable for application in indoor lighting environments can power a wide range of internet of things(Io T)related electronic devices.The ternary structure has huge advantages in improving the photovoltaic performance of OPVs,including broadening the light absorption,improving the charge transport,manipulating the energy loss(E_(loss))and so on.Herein,we use wide-bandgap photo-active materials,including the benzotriazole-based polymer donor(J52-F),chlorinated polymer donor(PM7)and A_(2)-A_1-D-A_1-A_(2)-structured acceptor(BTA3),to construct ternary OPVs for indoor light applications.Benefitting from the introduction of PM7 as the third component in J52-F:BTA3-based blend,a gratifying PCE of 20.04%with a high V_(OC)of 1.00 V can be obtained under the test conditions with an illumination of 300 lx from an LED lighting source with a color temperature of 3000 K.The excellent device performance is inseparable from the matched spectrum,enhanced light absorption and the reduced E_(loss),while the improved charge transport capability and suppression of carrier recombination also play an indelible role.Our work shows a potential material system to meet the requirement of devices applied under indoor light.Moreover,these findings demonstrate that designing multi-component OPVs is indeed a feasible way to further improve the performances of the photovoltaic energy conversion system for indoor applications.

关 键 词：Organic photovoltaics Indoor application Ternary blends Open-circuit voltage Charge generation 

分 类 号：TU18[建筑科学—建筑理论]