Alleviating Interfacial Recombination of Heterojunction Electron Transport Layer via Oxygen Vacancy Engineering for Efficient Perovskite Solar Cells Over 23%

作     者：Yohan Ko Taemin Kim Chanyong Lee Changhyun Lee Yong Ju Yun Yongseok Jun Yohan Ko;Taemin Kim;Chanyong Lee;Changhyun Lee;Yong Ju Yun;Yongseok Jun

作者机构：Graduate School of Energy and Environment(KU-KIST Green School)Korea UniversitySeoul 02841Korea 

出 版 物：《Energy & Environmental Materials》 (能源与环境材料（英文）)

年 卷 期：2023年第6卷第2期

页      面：311-322页

核心收录：

学科分类：0710[理学-生物学] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 0807[工学-动力工程及工程热物理] 0815[工学-水利工程] 0706[理学-大气科学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0702[理学-物理学] 

基　　金：supported by the New&Renewable Energy Core Technology Program of the Korea Institute of Energy Technology Evaluation and Planning(KETEP)granted financial resource from the Ministry of Trade,Industry&Energy(MOTIE),Republic of Korea(No.20213091010020) National Research Foundation of Korea(NRF)grant funded by the Korea Government(MSIT)(2020R1A2C1101085) the Korea Institute of Planning and Evaluation for Technology in Food,Agriculture and Forestry(IPET)and Korea Smart Farm R&D Foundation(KosFarm)through Smart Farm Innovation Technology Development Program funded by the Ministry of Agriculture,Food and Rural Affairs(MAFRA) the Ministry of Science and ICT(MSIT),Rural Development Administration(RDA)(421036-03) 

主　　题：electron transport bilayer heterojunction bilayers interfacial defect oxygen vacancy engineering perovskite solar cells 

摘      要：Electron transport layer(ETL)is pivotal to charge carrier transport for PSCs to reach the Shockley-Queisser *** study provides a fundamental understanding of heterojunction electron transport layers(ETLs)at the atomic level for stable and efficient perovskite solar cells(PSCs).The bilayer structure of an ETL composed of SnO_(2) on TiO_(2) was examined,revealing a critical factor limiting its potential to obtain efficient *** of oxygen vacancies in the TiO_(2) underlayer via an annealing process is found to induce manipulated band offsets at the interface between the TiO_(2) and SnO_(2) ***-depth electronic investigations of the bilayer structure elucidate the importance of the electronic properties at the interface between the TiO_(2) and SnO_(2) *** apparent correlation in hysteresis phenomena,including current density-voltage(J-V)curves,appears as a function of the type of band *** functional theory calculations reveal the intimate relationship between oxygen vacancies,deep trap states,and charge transport efficiency at the interface between the TiO_(2) and SnO_(2) *** formation of cascade band alignment via control over the TiO_(2) underlayer enhances device performance and suppresses *** performance exhibits a power conversion efficiency(PCE)of 23.45%with an open-circuit voltage(V_(oc))of 1.184 V,showing better device stability under maximum power point tracking compared with a staggered bilayer under one-sun continuous illumination.