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Hybrid Perovskite‐Organic Flexible Tandem Solar Cell Enabling Highly Efficient Electrocatalysis Overall Water Splitting
Author(s) -
Li Zhen,
Wu Shengfan,
Zhang Jie,
Lee Ka Chun,
Lei Hang,
Lin Francis,
Wang Zilong,
Zhu Zonglong,
Jen Alex K. Y.
Publication year - 2020
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.202000361
Subject(s) - tandem , materials science , perovskite (structure) , photocurrent , perovskite solar cell , energy conversion efficiency , optoelectronics , photovoltaic system , organic solar cell , hybrid solar cell , band gap , open circuit voltage , nanotechnology , polymer solar cell , chemical engineering , voltage , electrical engineering , composite material , engineering , polymer
Perovskite‐organic tandem solar cells are attracting more attention due to their potential for highly efficient and flexible photovoltaic device. In this work, efficient perovskite‐organic monolithic tandem solar cells integrating the wide bandgap perovskite (1.74 eV) and low bandgap organic active PBDB‐T:SN6IC‐4F (1.30 eV) layer, which serve as the top and bottom subcell, respectively, are developed. The resulting perovskite‐organic tandem solar cells with passivated wide‐bandgap perovskite show a remarkable power conversion efficiency (PCE) of 15.13%, with an open‐circuit voltage ( V oc ) of 1.85 V, a short‐circuit photocurrent ( J sc ) of 11.52 mA cm −2 , and a fill factor (FF) of 70.98%. Thanks to the advantages of low temperature fabrication processes and the flexibility properties of the device, a flexible tandem solar cell which obtain a PCE of 13.61%, with V oc of 1.80 V, J sc of 11.07 mA cm −2 , and FF of 68.31% is fabricated. Moreover, to demonstrate the achieved high V oc in the tandem solar cells for potential applications, a photovoltaic (PV)‐driven electrolysis system combing the tandem solar cell and water splitting electrocatalysis is assembled. The integrated device demonstrates a solar‐to‐hydrogen efficiency of 12.30% and 11.21% for rigid, and flexible perovskite‐organic tandem solar cell based PV‐driven electrolysis systems, respectively.