【摘 要】
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Hole transporting materials (HTMs) play an unparalleled role in heightening the stability and photovoltaic performance of perovskite solar cells (PSCs).The organic small molecule spiro-OMeTAD is frequ
【机 构】
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Eng.Res.Center of Environment-Friendly Functional Materials, Ministry of Education,Institute of Mate
【出 处】
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第八届新型太阳能材料科学与技术学术研讨会
论文部分内容阅读
Hole transporting materials (HTMs) play an unparalleled role in heightening the stability and photovoltaic performance of perovskite solar cells (PSCs).The organic small molecule spiro-OMeTAD is frequently utilized for HTM in PSCs.However,the raw spiro-OMeTAD without dopant would be harmful to the development of highly efficient PSCs,due to its unsatisfied hole mobility and conductivity.Therefore,we introduce an inorganic dopant (chromium trioxide,CrO3) into the lithium-salt doped spiro-OMeTAD.Because of the exclamatory oxidizability of CrO3,it can accelerate the oxidation of spiro-OMeTAD and thereby enhancing the hole mobility of HTM.The introduction of CrO3 not only substantially decreases the density of defects,but also adjusts spiro-OMeTAD energy band,and thus effectively suppresses the hysteresis and improving stability of PSCs.In the end,we obtained a power conversion efficiency (PCE) as high as 22.6% after doping CrO3 in spiro-OMeTAD.The facile,low cost and outstanding photovoltaic performance render CrO3 an excellent dopant for HTMs in PSCs.
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