在空穴传输层聚(3-己基噻吩)中添加1,8-二碘辛烷改善碳基钙钛矿太阳能电池的性能  

Improvement in performance of carbon-based perovskite solar cells by adding 1,8-diiodooctane into hole transport layer 3-hexylthiophene

作　　者：李家森 梁春军[1] 姬超 宫宏康 宋奇 张慧敏[1] 刘宁 Li Jia-Sen;Liang Chun-Jun;Ji Chao;Gong Hong-Kang;Song Qi;Zhang Hui-Min;Liu Ning(Key Laboratory of Luminescence and Optical Information Ministry of Education,Beijing Jiaotong University,Beijing 100044,China)

机构地区：[1]北京交通大学,发光与光信息教育部重点实验室,北京100044

出　　处：《物理学报》2021年第19期274-281,共8页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:61874008);北京市科委项目(批准号:Z181100004718004)资助的课题。

摘　　要：无空穴传输层的碳基钙钛矿太阳能(PSCs)电池拥有成本低、制备步骤简单、稳定性高的优点,应用前景广阔.但是碳电极与活性层的直接接触,导致器件的光电转换效率普遍低于其他金属电极的钙钛矿太阳能电池.本文使用聚(3-己基噻吩)(P3HT)作为器件的空穴传输层,相比传统的有机空穴传输层材料Spiro-OMeTAD,具有低成本和易于制造的优点,并通过在P3HT中掺杂1,8-二碘辛烷(DIO)的方法优化其光电性能,提升了载流子的迁移率,阻挡电子的运输,降低界面复合,改善了碳电极与器件的界面接触,提高了短路电流J_(sc)和填充因子FF,使器件的初始光电转换效率从14.06%提升至15.11%.器件在氮气环境下测试稳定性,连续光照1000 h后器件的转换效率仍保持在98%以上.HTL-free carbon-based perovskite solar(PSCs)batteries have the advantages of low cost,simple preparation steps,and high stability,and have broad application prospects.However,the direct contact between the carbon electrode and the active layer causes the photoelectric conversion efficiency of the device to be generally lower than that of other metal electrode perovskite solar cells.Therefore,it is necessary to add a hole-transport layer between the perovskite layer and the electrode to improve the charge transport efficiency and optimize the performance.Poly(3-hexylthiophene)has excellent photoelectric properties and is regarded as one of the suitable hole transport materials for perovskite solar cells.In this paper,P3HT is used as the hole transport layer of the device.Compared with the traditional organic hole-transport layer Spiro-OMeTAD,the P3HT has the advantages of low cost and easy manufacture.However,in the current devices with using P3HT as the hole transport layer,due to the characteristics of the surface morphology and molecular ordering of the P3HT film,the carrier mobility in the film itself is low,resulting in unsatisfactory device performance.Studies have shown that the surface morphology and molecular arrangement of the P3HT film can be changed by doping,and the migration rate of charge-carriers inside the film can be accelerated,thereby improving the photovoltaic performance of the solar cell.In this paper,a printing process is used to print carbon paste on the hole transport layer as the electrode of the device,and spin coating is used to prepare the transport layer.And through the method of doping 1,8-diiodooctane(DIO)in P3HT to optimize the device performance,the photoelectric conversion efficiency of the carbon-based perovskite solar cell is improved,the mobility of holes is improved,and the transportation of electrons is blocked.The reduced interface recombination,the improved interface contact between the carbon electrode and the device,the increased short-circuit current Jsc and the fill f

关 键 词：钙钛矿 太阳能电池 聚(3-己基噻吩) 1 8-二碘辛烷 

分 类 号：TQ317[化学工程—高聚物工业] TM914.4[电气工程—电力电子与电力传动]