TY - JOUR
T1 - Bi-Directional functionalization of urea-complexed SnO2 for efficient planar perovskite solar cells
AU - Gao, Bingyu
AU - Cao, Qi
AU - Pu, Xingyu
AU - Yang, Jiabao
AU - Han, Jian
AU - Wang, Shuangjie
AU - Li, Tongtong
AU - He, Ziwei
AU - Li, Xuanhua
N1 - Publisher Copyright:
© 2020
PY - 2021/4/30
Y1 - 2021/4/30
N2 - SnO2 is regarded as the most promising electron transporting layer (ETL) material for perovskite solar cells (PSCs). Various functional groups are introduced onto the SnO2 surface by interface modification with the purpose of improving the performance of the PSCs. However, most of the modifications are achieved in two-step approach, which are complicated and not easily realized. Here, we employ a facile one-step, low-temperature, and effective method to synthesis urea-complexed SnO2 ETL (referred as Urea-SnO2). The –NH2 groups on Urea-SnO2 attributes to facilitate the charge transfer within the SnO2 ETL and reduce trap state density in the perovskite film through the chemical interactions. Therefore, The PSCs based on the Urea-SnO2 ETL exhibit a champion power conversion efficiency (PCE) of 20.25%, which is more excellent than the devices based on the pristine SnO2 ETL (17.60%). Functionalization of SnO2 in situ by the precursor solution method offers an efficient method for high performance planar PSCs.
AB - SnO2 is regarded as the most promising electron transporting layer (ETL) material for perovskite solar cells (PSCs). Various functional groups are introduced onto the SnO2 surface by interface modification with the purpose of improving the performance of the PSCs. However, most of the modifications are achieved in two-step approach, which are complicated and not easily realized. Here, we employ a facile one-step, low-temperature, and effective method to synthesis urea-complexed SnO2 ETL (referred as Urea-SnO2). The –NH2 groups on Urea-SnO2 attributes to facilitate the charge transfer within the SnO2 ETL and reduce trap state density in the perovskite film through the chemical interactions. Therefore, The PSCs based on the Urea-SnO2 ETL exhibit a champion power conversion efficiency (PCE) of 20.25%, which is more excellent than the devices based on the pristine SnO2 ETL (17.60%). Functionalization of SnO2 in situ by the precursor solution method offers an efficient method for high performance planar PSCs.
KW - Amino groups
KW - Electron transport layers
KW - Perovskite solar cells
KW - Tin oxide
UR - http://www.scopus.com/inward/record.url?scp=85100146929&partnerID=8YFLogxK
U2 - 10.1016/j.apsusc.2020.148711
DO - 10.1016/j.apsusc.2020.148711
M3 - 文章
AN - SCOPUS:85100146929
SN - 0169-4332
VL - 546
JO - Applied Surface Science
JF - Applied Surface Science
M1 - 148711
ER -