TY - JOUR
T1 - Highly efficient and stable planar CsPbI2Br perovskite solar cell with a new sensitive-dopant-free hole transport layer obtained via an effective surface passivation
AU - Yang, Shaomin
AU - Zhao, Huan
AU - Wu, Min
AU - Yuan, Shihao
AU - Han, Yu
AU - Liu, Zhike
AU - Guo, Kunpeng
AU - Liu, Shengzhong (Frank)
AU - Yang, S.
AU - Zhao, H.
AU - Yuan, S.
AU - Han, Y.
AU - Liu, Z.
AU - Liu, S.
AU - Wu, M.
AU - Guo, K.
N1 - Generated from Scopus record by KAUST IRTS on 2023-09-21
PY - 2019/10/1
Y1 - 2019/10/1
N2 - Hole transport layers (HTLs) plays critical role in CsPbI2Br perovskite solar cells (PSCs). However, few studies have been done to develop new and sensitive-dopant-free HTL for CsPbI2Br PSCs. Here, a low-cost fluorinated N',N',N'',N''-tetrakis(4-methoxyphenyl)spiro[fluorene-9,9'-xanthene]-2,7-diamine (2mF-X59) was synthesized and applied as sensitive-dopant-free HTL into CsPbI2Br PSCs. After modified the 2mF-X59 and CsPbI2Br surface by 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquino-dimethane (F4-TCNQ), a maximum power conversion efficiency (PCE) of 14.42% was obtained for CsPbI2Br PSC with an impressive open-circuit voltage (Voc) of 1.23 V, which is higher than that of the most previously reported CsPbI2Br PSCs with the doped Spiro-OMeTAD. More importantly, the CsPbI2Br PSCs with the newly developed HTLs showed remarkable stability retaining more than 94% of their initial PCE value after aging in air for 30 days without encapsulation. Therefore, we firmly believe that our new 2mF-X59 HTL created via molecular engineering is a promising candidate for preparing high performance CsPbI2Br PSCs.
AB - Hole transport layers (HTLs) plays critical role in CsPbI2Br perovskite solar cells (PSCs). However, few studies have been done to develop new and sensitive-dopant-free HTL for CsPbI2Br PSCs. Here, a low-cost fluorinated N',N',N'',N''-tetrakis(4-methoxyphenyl)spiro[fluorene-9,9'-xanthene]-2,7-diamine (2mF-X59) was synthesized and applied as sensitive-dopant-free HTL into CsPbI2Br PSCs. After modified the 2mF-X59 and CsPbI2Br surface by 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquino-dimethane (F4-TCNQ), a maximum power conversion efficiency (PCE) of 14.42% was obtained for CsPbI2Br PSC with an impressive open-circuit voltage (Voc) of 1.23 V, which is higher than that of the most previously reported CsPbI2Br PSCs with the doped Spiro-OMeTAD. More importantly, the CsPbI2Br PSCs with the newly developed HTLs showed remarkable stability retaining more than 94% of their initial PCE value after aging in air for 30 days without encapsulation. Therefore, we firmly believe that our new 2mF-X59 HTL created via molecular engineering is a promising candidate for preparing high performance CsPbI2Br PSCs.
UR - https://linkinghub.elsevier.com/retrieve/pii/S0927024819303812
UR - http://www.scopus.com/inward/record.url?scp=85068895195&partnerID=8YFLogxK
U2 - 10.1016/j.solmat.2019.110052
DO - 10.1016/j.solmat.2019.110052
M3 - Article
SN - 0927-0248
VL - 201
JO - Solar Energy Materials and Solar Cells
JF - Solar Energy Materials and Solar Cells
ER -
