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Low‐Temperature Electron Beam Deposition of Zn‐SnO x for Stable and Flexible Perovskite Solar Cells
Author(s) -
Song Zonglong,
Bi Wenbo,
Zhuang Xinmeng,
Wu Yanjie,
Zhang Boxue,
Chen Xinfu,
Chen Cong,
Dai Qilin,
Song Hongwei
Publication year - 2020
Publication title -
solar rrl
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.544
H-Index - 37
ISSN - 2367-198X
DOI - 10.1002/solr.201900266
Subject(s) - materials science , energy conversion efficiency , perovskite (structure) , fabrication , optoelectronics , doping , deposition (geology) , conductivity , relative humidity , nanotechnology , cathode ray , perovskite solar cell , electron , chemical engineering , chemistry , medicine , paleontology , alternative medicine , physics , sediment , thermodynamics , pathology , quantum mechanics , engineering , biology
Perovskite solar cells (PSCs) attract tremendous interest due to their feasibility, high power conversion efficiency (PCE), light weight, and flexible architecture. However, some challenges are still present for cheap mass fabrication in commercial applications. Herein, efficient Zn‐SnO x electron transport layers (ETLs) are used by the low‐temperature (100 °C) electron beam (E‐beam) method. Doping Zn 2+ in SnO 2 improves conductivity, suppresses charge recombination, and optimizes the energy level structure of SnO 2 , leading to an improved PCE from 18.95% to 20.16%. More importantly, the PCE of the modified device is more than 80% of its initial values for 800 h in ambient air with a relative humidity of ≈40%. The flexible device exhibits a PCE of 15.25% and remains at an initial PCE of 83% after 100 bending cycles. The efficient and flexible PSCs are potentially used as wearable energy power sources. The low‐temperature preparation of ETL and the excellent performance of devices present great commercial potential for future applications.