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Flexible Perovskite Solar Modules with Functional Layers Fully Vacuum Deposited
Author(s) -
Lei Ting,
Li Feihong,
Zhu Xinyi,
Dong Hua,
Niu Zhiwen,
Ye Siwei,
Zhao Wu,
Xi Jun,
Jiao Bo,
Ding Liming,
Wu Zhaoxin
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.202000292
Subject(s) - perovskite (structure) , materials science , triphenylamine , energy conversion efficiency , evaporation , pedot:pss , layer (electronics) , chemical engineering , optoelectronics , nanotechnology , physics , engineering , thermodynamics
Large‐area homogeneous and uniform perovskite films are key to the mass production of perovskite solar cells, especially the flexible ones. Different from the solution‐processed preparation, herein an all‐evaporation technique is developed for both perovskite films and the hole‐transporting layer in the modules. With the two‐step strategy of active‐layer design, homogeneous large‐area perovskite films are prepared via evaporation of first PbI 2 and then CH 3 NH 3 I. An 2,3,5,6‐tetrauoro‐7,7,8,8‐tetracyanoquinodimethane (F4TCNQ)‐doped 4,4′,4″‐tris( N ‐(aphthalene‐2‐yl)‐ N ‐phenylamino)triphenylamine (2T‐NATA) hybrid hole‐transporting layer is deposited on the indium‐tin‐oxide electrode via coevaporation. A power conversion efficiency (PCE) beyond 13% is achieved with the as‐prepared flexible perovskite solar module (active area of 16.0 cm 2 ), which exhibits both higher stability and higher efficiency than the conventional solution‐processed module using poly(3,4‐ethylenedioxythiophene)‐poly(styrenesulfonate) (PEDOT:PSS) as the hole‐transporting material. This novel strategy of all‐evaporation functional layers provides a feasible way for the industrialization of flexible perovskite solar cells.