TY - JOUR
T1 - Dopant-Free Hole Transporting Material Based on Nonconjugated Adamantane for High-Performance Perovskite Solar Cells
AU - Fan, Dongyu
AU - Zhang, Ren
AU - Li, Yuheng
AU - Shan, Chengwei
AU - Li, Wenhui
AU - Wang, Yunhao
AU - Xu, Feiyang
AU - Fan, Hua
AU - Sun, Zonghao
AU - Li, Xuehui
AU - Zhao, Mengshuai
AU - Kyaw, Aung Ko Ko
AU - Li, Gongqiang
AU - Wang, Jianpu
AU - Huang, Wei
N1 - Publisher Copyright:
Copyright © 2021 Fan, Zhang, Li, Shan, Li, Wang, Xu, Fan, Sun, Li, Zhao, Kyaw, Li, Wang and Huang.
PY - 2021/10/25
Y1 - 2021/10/25
N2 - A new dopant-free hole transporting material (HTM) 4′,4‴,4‴'',4‴''''-(adamantane-1,3,5,7-tetrayl)tetrakis(N,N-bis(4-methoxyphenyl)-[1,1′-biphenyl]-4-amine) (Ad-Ph-OMeTAD) (named FDY for short), which consists of a nonconjugated 3D bulky caged adamantane (Ad) as the core, triphenyl amines as side arms, and phenyl units as a linking bridge, is synthesized and applied in an inverted planar perovskite solar cell (PSC). As a result, the champion device with FDY as HTM yields an impressive power of conversion efficiency (PCE) of 18.69%, with JSC = 22.42 mA cm−2, VOC = 1.05 V, and FF = 79.31% under standard AM 1.5G illumination, which is ca. 20% higher than that of the device based on PEDOT:PSS (only 15.41%). Notably, the stability of PSC based on FDY is much better than that of devices based on PEDOT:PSS, and the corresponding devices retain over 90% of their initial PCEs after storing for 60 days in a nitrogen glove box without any encapsulation. Even when stored in an open air condition with 50–60% relative humidity for 188 h, the retained PCE is still over 81% of its initial one. All these results demonstrate that the new design strategy by combing the bulky and nonconjugated (aliphatic) adamantane unit as the core and triphenyl amines as side arms can efficiently develop highly efficient HTMs for PSCs, which is different from the traditional way based on conjugated backbones, and it may open a new way for scientists to design small-molecule HTMs for PSCs.
AB - A new dopant-free hole transporting material (HTM) 4′,4‴,4‴'',4‴''''-(adamantane-1,3,5,7-tetrayl)tetrakis(N,N-bis(4-methoxyphenyl)-[1,1′-biphenyl]-4-amine) (Ad-Ph-OMeTAD) (named FDY for short), which consists of a nonconjugated 3D bulky caged adamantane (Ad) as the core, triphenyl amines as side arms, and phenyl units as a linking bridge, is synthesized and applied in an inverted planar perovskite solar cell (PSC). As a result, the champion device with FDY as HTM yields an impressive power of conversion efficiency (PCE) of 18.69%, with JSC = 22.42 mA cm−2, VOC = 1.05 V, and FF = 79.31% under standard AM 1.5G illumination, which is ca. 20% higher than that of the device based on PEDOT:PSS (only 15.41%). Notably, the stability of PSC based on FDY is much better than that of devices based on PEDOT:PSS, and the corresponding devices retain over 90% of their initial PCEs after storing for 60 days in a nitrogen glove box without any encapsulation. Even when stored in an open air condition with 50–60% relative humidity for 188 h, the retained PCE is still over 81% of its initial one. All these results demonstrate that the new design strategy by combing the bulky and nonconjugated (aliphatic) adamantane unit as the core and triphenyl amines as side arms can efficiently develop highly efficient HTMs for PSCs, which is different from the traditional way based on conjugated backbones, and it may open a new way for scientists to design small-molecule HTMs for PSCs.
KW - adamantane
KW - dopant free
KW - hole transporting material
KW - inverted planar structure
KW - perovskite solar cells
UR - http://www.scopus.com/inward/record.url?scp=85118698261&partnerID=8YFLogxK
U2 - 10.3389/fchem.2021.746365
DO - 10.3389/fchem.2021.746365
M3 - 文章
AN - SCOPUS:85118698261
SN - 2296-2646
VL - 9
JO - Frontiers in Chemistry
JF - Frontiers in Chemistry
M1 - 746365
ER -