基于聚合物非富勒烯体系PM6:Y6的钙钛矿/有机集成太阳电池光伏性能优化  

Photovoltaic performance optimization of integrated perovskite/organic solar cells based on PM6:Y6 polymer non-fullerene system

作　　者：孟婧 高博文 Meng Jing;Gao Bo-Wen(Network and Educational Technology Center,Taishan University,Tai’an 271021,China;Institute of Photovoltaic Materials and Building Integration,College of Mechanical and Architectural Engineering,Taishan University,Tai’an 271021,China)

机构地区：[1]泰山学院网络与教育技术中心,泰安271021 [2]泰山学院机械与建筑工程学院,光伏材料与建筑一体化研究所,泰安271021

出　　处：《物理学报》2023年第12期304-313,共10页Acta Physica Sinica

基　　金：山东省自然科学基金重点项目(批准号:ZR2020KF001);山东省泰安市科技创新发展项目(批准号:2021GX017);泰山学院教育教学研究专项重点项目(批准号:JY-01-202101);泰山学院教学改革与研究项目(批准号:JG202122);泰山学院横向科研项目(批准号:2022HX222)资助的课题。

摘　　要：通过工艺创新和薄膜优化技术成功制备基于CH_(3)NH_(3)PbI_(3)/PM6:Y6(BTP-4F)的钙钛矿/有机集成太阳电池(IPOSCs).通过添加剂1-8二碘辛烷DIO的调控和热退火处理,极大优化CH_(3)NH_(3)PbI_(3)/PM6:Y6混合薄膜质量和获得层间欧姆接触.与此同时,近红外区有机层的空穴和电子迁移率为8.3×10^(-3)cm^(2)/(V·s)和8.8×10^(-3)cm^(2)/(V·s),可以和可见区钙钛矿层的空穴和电子迁移率相匹配,实现在微观通路上达到载流子运输平衡,导致器件具有高短路电流密度Jsc和高填充因子FF.另外,通过优化聚合物非富勒烯体系PM6:Y6质量比例混合成膜,使得薄膜中的非辐射复合位点密度和载流子复合明显减少,使得电子和空穴的提取和传输更加高效,能够提供更大的驱动力来改善载流子传输,同时形成更宽的耗尽区来抑制载流子复合以提高器件的开路电压Voc.优化的集成太阳能电池的短路电流密度提升到25.88 A/cm^(2),开路电压Voc增加到1.18 V,填充因子FF达到80%,光响应扩宽到950 nm,外量子效率在可见光区达到90%,最佳能量转换效率高达24.42%,这是目前报道的IPOSCs中的最高效率之一.结果表明,通过可见区材料和近红外区聚合物非富勒烯体系材料组合和器件结构优化来增强钙钛矿太阳电池对于近红外光的吸收,从而提升IPOSCs性能是一种有效的手段和方法.为将来开发高效率IPOSCs奠定了实验工艺和构建理论基础.Integrated perovskite/organic solar cells(IPOSCs)based on CH_(3)NH_(3)PbI_(3)/PM6:Y6(BTP-4F)are successfully prepared through process innovation and thin film optimization technology.The quality of CH_(3)NH_(3)PbI_(3)/PM6:Y6 mixed films is greatly optimized,and the interlayer ohmic contact is obtained by regulating the additive DIO and annealing treatment.At the same time,the mobility of holes and electrons in the organic layer in the near infrared region are,respectively,8.3×10^(-3)cm^(2)/(V·s)and 8.8×10^(-3)cm^(2)/(V·s),which can match the mobility of holes and electrons in the visible perovskite layer,achieving the carrier transport balance in the microscopic pathway.The device has high short-circuit current density Jsc and high filling factor FF.In addition,by optimizing the mass ratio of polymer non-fullerene system PM6:Y6 to form a film,the density of non-radiation recombination sites and carrier recombination in the film are significantly reduced,making the extraction and transport of electrons and holes more efficient,and providing greater driving force to improve carrier transport.At the same time,a wider depletion region is formed to inhibit carrier recombination and increase the open-circuit voltage Voc.The short-circuit current density of the optimized integrated solar cell increases to 25.88 A/cm^(2),the open-circuit voltage Voc increases to 1.18 V,the filling factor FF reaches 80%,the optical response expands to 950 nm,the external quantum efficiency reaches 90%in the visible region,and the optimal energy conversion efficiency is as high as 24.42%.This is one of the highest efficiencies reported in IPOSCs.The results show that it is an effective method to enhance the near-infrared light absorption of perovskite solar cells and improve the performance of IPOSCs by combining the materials in visible region and the polymer non-fullerene system in near infrared region and optimizing the device structure.It lays a theoretical foundation for developing high efficiency IPOSCs in the future.

关 键 词：钙钛矿/有机集成太阳电池 聚合物非富勒烯体系 载流子运输平衡 非辐射复合 

分 类 号：TM914.4[电气工程—电力电子与电力传动] TB383.2[一般工业技术—材料科学与工程]