PbTiO_(3)修饰和极化处理提升钙钛矿太阳能电池性能  

Enhanced Photovoltaic Performance of Perovskite Solar Cells by PbTiO_(3)Modification and Polarization Treatment

作　　者：厉佥元 李纪伟 张钰涵 刘焱康 孟阳 储余 朱一佳 徐诺言 朱亮 张传香[2] 陶海军[1] LI Qianyuan;LI Jiwei;ZHANG Yuhan;LIU Yankang;MENG Yang;CHU Yu;ZHU Yijia;XU Nuoyan;ZHU Liang;ZHANG Chuanxiang;TAO Haijun(College of Materials Science and Technology,Nanjing University of Aeronautics and Astronautics,Nanjing 211106,China;College of Material Science and Engineering,Nanjing Institute of Technology,Nanjing 211167,China)

机构地区：[1]南京航空航天大学材料科学与技术学院,南京211106 [2]南京工程学院材料科学与工程学院,南京211167

出　　处：《无机材料学报》2024年第11期1205-1211,共7页Journal of Inorganic Materials

摘　　要：碳基钙钛矿太阳能电池(C-PSCs)具有高光电转换效率(PCE)、长期稳定、低成本优势,有助于实现钙钛矿太阳能电池(PSCs)商业化。本工作在TiO_(2)致密电子传输层(c-TiO_(2))上原位生成PbTiO_(3),研究了PbTiO_(3)修饰和极化处理对C-PSCs光伏性能的促进作用。研究发现,反应30 s制备的PbTiO_(3)不仅能够有效地抑制电子传输层的电阻增长,而且将界面处载流子积聚下降至29.7%,大幅度提升了载流子分离能力。此外,进一步极化处理c-TiO_(2)/PbTiO_(3)层可以将载流子积聚下降至6.78%,使得PSCs的开路电压(V_(oc))达到0.93 V,短路电流密度(J_(sc))达到14.83 mA/cm^(2),填充因子(FF)达到51.16%,PCE达到7.11%。本工作系统研究了PbTiO_(3)修饰和极化处理的方法,提出了改善C-PSCs性能的研究策略,揭示了优化载流子传输性能的内在机制,为开发高效率、低成本和长寿命的商业化PSCs提供了经验借鉴。Carbon-based perovskite solar cells(C-PSCs)have attracted significant interest for their advantages of high photoelectric conversion efficiency(PCE),long-term stability and low cost,showing superiority in commercialization of perovskite solar cells(PSCs).However,the promoting effect of PbTiO_(3)modification and polarization treatment on C-PSCs photovoltaic performance by in-situ generation of PbTiO_(3)on a dense electron transport layer of TiO_(2)(c-TiO_(2))is still unknow.It was found that the PbTiO_(3)formed after reaction for 30 s could effectively restrict the sharp increase in resistance of the electron transport layer,and substantially reduced the carrier accumulation at the interface to 29.7%,greatly improving the carrier separation ability.In addition,the carrier accumulation was further reduced to 6.78%through polarizing the c-TiO_(2)/PbTiO_(3)layer,so that PSCs displayed 0.93 V of open circuit voltage(V_(oc)),14.83 mA/cm^(2)of short circuit current density(J_(sc)),51.16%of fill factor(FF),and 7.11%of PCE.This work comprehensively reports the methods of PbTiO_(3)modification and polarization treatment,proposes a research strategy to improve the performance of C-PSCs,reveals the intrinsic mechanism for optimizing carrier transport performance,and provides a way for developing high-efficiency,low-cost and long-life commercial PSCs.

关 键 词：钙钛矿太阳能电池 电子传输层 铁电修饰 极化处理 

分 类 号：TN336[电子电信—物理电子学]