锂掺杂提高硫氰酸亚铜的电学特性及在钙钛矿太阳电池中的应用  

Improved electrical properties of cuprous thiocyanate by lithium doping and its application in perovskite solar cells

作　　者：韩梅斗雪 王雅 王荣波 赵均陶 任慧志[1,2,3,4,5] 侯国付 赵颖[1,2,3,4,5] 张晓丹 丁毅[1,2,3,4,5] Han Mei-Dou-Xue;Wang Ya;Wang Rong-Bo;Zhao Jun-Tao;Ren Hui-Zhi;Hou Guo-Fu;Zhao Ying;Zhang Xiao-Dan;Ding Yi(Solar Energy Conversion Center,Institute of Photoelectronic Thin Film Devices and Technology,Nankai University,Tianjin 300350,China;Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin,Tianjin 300350,China;Engineering Research Center of Thin Film Photoelectronic Technology of Ministry of Education,Tianjin 300350,China;Collaborative Innovation Center of Chemical Science and Engineering(Tianjin),Tianjin 300072,China;Renewable Energy Conversion and Storage Center,Nankai University,Tianjin 300072,China)

机构地区：[1]南开大学,光电子薄膜器件与技术研究所,太阳能转换中心,天津300350 [2]天津市光电子薄膜器件与技术重点实验室,天津300350 [3]薄膜光电子技术教育部工程研究中心,天津300350 [4]化学科学与工程协同创新中心,天津300072 [5]南开大学可再生能源转换与储存中心,天津300072

出　　处：《物理学报》2022年第21期322-328,共7页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:61874061,61674084);国家重点研发计划(批准号:2018YFB1500103);高等学校学科创新引智计划(111计划)(批准号:B16027)资助的课题。

摘　　要：高效钙钛矿太阳电池中通常采用有机p型半导体材料作为空穴传输层.有机材料在湿度、温度、紫外照射等环境因素下会出现严重的性能衰退,加速钙钛矿太阳电池的老化,成为实现其实际应用的主要障碍之一.本文提出采用无机硫氢酸亚铜(CuSCN)作为空穴传输材料,并通过锂掺杂提高其空穴传输特性;在此基础上采用聚[双(4苯基)(2,4,6-三甲基苯基)胺]修饰CuSCN表面,避免CuSCN和碘化铅(PbI_(2))间的相互作用,实现了大晶粒、致密钙钛矿薄膜的制备,最终实现了钙钛矿太阳电池性能的有效提升.本工作为稳定、高效钙钛矿太阳电池的制备提供了可借鉴的策略.Perovskite solar cells have attracted extensive attention because of their photoelectric characteristics.Since 2009,the photoelectric conversion rate of the solar cells has soared from 3.8%to 25.7%.Perovskite material has become a focus of extensive academic research due to its advantages of high carrier mobility,low exciton binding energy,wide absorption spectrum and high optical absorption coefficient.However,organic P-type semiconductor material is usually used as a hole transport layer in high efficiency perovskite solar cells,for example,Spiro-OMeTAD,PEDOT:PSS,and PTAA.Because Spiro-OMeTAD is difficult to purify,many hole transport materials containing triphenylamine like Spiro-OMeTAD have been synthesized,such as triphenylamine polymer PTAA.As the conjugate parts of these triphenylamine transport materials are not coplanar and the space is distorted,they cannot form ordered stacks by spin-coating method,so their charge properties are weak,and li-TFSI and tBP are often added to improve the hole transport,so as to achieve better device effects.Moreover,the PTAA has the problem of infiltration,and it is difficult to form a completely covered perovskite film on it,which seriously affects the quality and surface morphology of perovskite film.The PEDOT:PSS itself has an acidic and corrosive electrode,and is easy to absorb moisture,which will affect the stability of the solar cell.The performance of organic material will deteriorate seriously under environmental factors such as humidity,temperature and UV irradiation,which will accelerate the aging of perovskite solar cells and become one of the main obstacles to their practical applications.In this work,the inorganic cuprous thiocyanate(CuSCN)is used as a hole transport material,the CuSCN is a rich and stable P-type semiconductor material,which has the characteristics of abundance,low cost,high carrier mobility,appropriate energy level,low defect density,good thermal stability,and excellent light transmittance.The CuSCN is one of the few known compounds with both

关 键 词：钙钛矿太阳电池 空穴传输层 硫氢酸亚铜 锂掺杂 

分 类 号：TB34[一般工业技术—材料科学与工程] TM914.4[电气工程—电力电子与电力传动]