定向控制介孔PbI_(2)支架制备效率达22.7%的钙钛矿太阳能电池  

Orientation-controlled mesoporous PbI_(2)scaffold for 22.7%perovskite solar cells

作　　者：黄德军 刘千羽 马柱 李炎林 晏广元 侯山月 杜卓维 羊俊波 陈义 唐术芳 周恒宇 向燕 章文峰 黄跃龙 麦耀华 Dejun Huang;Qianyu Liu;Zhu Ma;Yanlin Li;Guangyuan Yan;Shanyue Hou;Zhuowei Du;Junbo Yang;Yi Chen;Shufang Tang;Hengyu Zhou;Yan Xiang;Wenfeng Zhang;Yuelong Huang;Yaohua Mai(Institute of Photovoltaic,Southwest Petroleum University,Chengdu 610500,China;Institute of New Energy Technology,Jinan University,Guangzhou 510632,China;State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu 610500,China)

机构地区：[1]Institute of Photovoltaic,Southwest Petroleum University,Chengdu 610500,China [2]Institute of New Energy Technology,Jinan University,Guangzhou 510632,China [3]State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu 610500,China

出　　处：《Science China Materials》2023年第4期1313-1322,共10页中国科学（材料科学（英文版）

基　　金：supported by the Open Fund of the State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation(Southwest Petroleum University,PLN2021-17);the Science and Technology Project of Southwest Petroleum University(2021JBGS08);Sichuan Science and Technology Program(2022YFSY0040)。

摘　　要：顺序沉积技术为钙钛矿薄膜的制造提供了一种有前途的策略.然而,PbI_(2)薄膜的高度结晶和致密形态会影响钙钛矿薄膜的质量和再现性.本文将烟酰胺(NTM)衍生物作为简单有效的多功能配体引入到PbI_(2)前体溶液中,获得了方向可控的介孔PbI_(2)支架,这源于强烈的化学相互作用和溶剂的加速挥发.本文还制备了位于钙钛矿薄膜晶界处并具有NTM衍生物的纳米带PbI_(2)晶体,其可以钝化缺陷并提高载流子寿命.基于6-(三氟甲基)烟酰胺(6-F-NTM)调制薄膜的钙钛矿太阳能电池的功率转换效率可提高到22.7%,在2000小时老化后,其功率转换效率为原始值的98.8%.本工作为调节PbI_(2)薄膜的结晶和控制过量的PbI_(2)结构以实现高效钙钛矿太阳能电池提供了新思路.Sequential deposition is a promising tactic for perovskite film fabrication.However,the highly crystalline and compact morphology of PbI_(2)film will hinder the quality and reproducibility of perovskite films.Here,nicotinamide(NTM)derivatives were introduced as simple and effective multifunctional ligands into the PbI_(2)precursor solution.Orientation-controlled and mesoporous PbI_(2)scaffolds formed due to strong chemical interaction and accelerated solvent volatilization.Nanobelt PbI_(2)crystals were also generated at the grain boundaries of perovskite films with NTM derivatives,which can passivate the defects and enhance the carrier lifetime.As a result,the perovskite solar cells based on 6-(trifluoromethyl)nicotinamide-modulated films showed an enhanced power conversion efficiency of 22.7%,of which98.8%was maintained even after 2000 h of aging.Our findings offer a distinctive understanding of regulating the crystallization of PbI_(2)films and manipulating excess PbI_(2)structure for efficient perovskite solar cells.

关 键 词：钙钛矿太阳能电池 功率转换效率 钙钛矿薄膜 化学相互作用 定向控制 载流子寿命 沉积技术 烟酰胺 

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]