TY - JOUR
T1 - Multifunctional Buried Molecule-Bridge for High-Performance Inverted Perovskite Solar Cells
AU - Gao, Mingyang
AU - Ou, Zeping
AU - Wang, Can
AU - Liu, Lei
AU - Hu, Dingqin
AU - Wan, Wei
AU - Chen, Peidong
AU - Pan, Yi
AU - Nie, Shisong
AU - Luo, Yuanyi
AU - Zhang, Pengyan
AU - Peng, Deyong
AU - Zhao, Ke
AU - Fu, Meirong
AU - Liu, Wei
AU - Wang, Xia
AU - Zhang, Wei
AU - Guo, Haoxuan
AU - Zheng, Yujie
AU - Xiao, Zeyun
AU - Gao, Xingyu
AU - Ma, Zhu
AU - Wang, Rui
AU - Jiang, Tingming
AU - Sun, Kuan
PY - 2025/9/17
Y1 - 2025/9/17
N2 - Carbazole-based self-assembled monolayers (SAMs) as an effective hole transportation layer have tremendously advanced the power conversion efficiency (PCE) of inverted perovskite solar cells (PSCs). However, the inhomogeneous distribution of SAMs on substrate and non-intimate interface contact can bring about significant interfacial energy loss at SAM/perovskite heterojunction. Herein, a small molecule 4-Bromobenzylphosphnic acid (4Br-BPA) is constructed as a molecule bridge connecting [4-(3,6-dimethyl-9H-carbazol-9-yl) butyl] phosphonic acid (Me-4PACz) and perovskite, exhibiting multifunctionality on improving the interfacial characteristics. First, the small-size 4Br-BPA molecules can partly fill some voids on NiOx/Me-4PACz anchored with NiOx via phosphonic acid group, meanwhile ameliorating the NiOx surface state. Second, the 4Br-BPA post-deposited onto Me-4PACz interacting with Me-4PACz via pi-pi stacking has suppressed charge accumulation at interface, aligned the energy level of NiOx/Me-4PACz consequently promoting the hole transportation. Third, the interplay between 4Br-BPA and perovskite enables effective passivation of interfacial traps, and the substrate NiOx/Me-4PACz/4Br-BPA with improved wettability has facilitated the perovskite film growth with enhanced crystallization and released residual stress. Consequently, all these benefits have been transformed to an impressive PCE of 26.59% (certified 26.12%). The device based on 4Br-BPA also demonstrates much improved operational stability, maintaining approximate to 90% of initial efficiency under 1400 h continuous one-sun illumination. © 2025 Wiley-VCH GmbH
AB - Carbazole-based self-assembled monolayers (SAMs) as an effective hole transportation layer have tremendously advanced the power conversion efficiency (PCE) of inverted perovskite solar cells (PSCs). However, the inhomogeneous distribution of SAMs on substrate and non-intimate interface contact can bring about significant interfacial energy loss at SAM/perovskite heterojunction. Herein, a small molecule 4-Bromobenzylphosphnic acid (4Br-BPA) is constructed as a molecule bridge connecting [4-(3,6-dimethyl-9H-carbazol-9-yl) butyl] phosphonic acid (Me-4PACz) and perovskite, exhibiting multifunctionality on improving the interfacial characteristics. First, the small-size 4Br-BPA molecules can partly fill some voids on NiOx/Me-4PACz anchored with NiOx via phosphonic acid group, meanwhile ameliorating the NiOx surface state. Second, the 4Br-BPA post-deposited onto Me-4PACz interacting with Me-4PACz via pi-pi stacking has suppressed charge accumulation at interface, aligned the energy level of NiOx/Me-4PACz consequently promoting the hole transportation. Third, the interplay between 4Br-BPA and perovskite enables effective passivation of interfacial traps, and the substrate NiOx/Me-4PACz/4Br-BPA with improved wettability has facilitated the perovskite film growth with enhanced crystallization and released residual stress. Consequently, all these benefits have been transformed to an impressive PCE of 26.59% (certified 26.12%). The device based on 4Br-BPA also demonstrates much improved operational stability, maintaining approximate to 90% of initial efficiency under 1400 h continuous one-sun illumination. © 2025 Wiley-VCH GmbH
KW - buried interface
KW - interfacial passivation
KW - multifunctional molecular-bridge
KW - perovskite solar cells
KW - self-assembled monolayers
UR - https://www.scopus.com/pages/publications/105016367948
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-105016367948&origin=recordpage
UR - https://www.webofscience.com/wos/woscc/full-record/WOS:001572570800001
U2 - 10.1002/adma.202514273
DO - 10.1002/adma.202514273
M3 - RGC 21 - Publication in refereed journal
SN - 0935-9648
JO - Advanced Materials
JF - Advanced Materials
M1 - e14273
ER -
SDG 7 Affordable and Clean Energy