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A Sandwich‐Like Organolead Halide Perovskite Photocathode for Efficient and Durable Photoelectrochemical Hydrogen Evolution in Water
Author(s) -
Zhang Hefeng,
Yang Zhou,
Yu Wei,
Wang Hong,
Ma Weiguang,
Zong Xu,
Li Can
Publication year - 2018
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.201800795
Subject(s) - photocathode , photocurrent , perovskite (structure) , materials science , water splitting , halide , photoelectrochemical cell , optoelectronics , hydrogen production , reversible hydrogen electrode , electrode , hydrogen , nanotechnology , chemical engineering , catalysis , inorganic chemistry , electrochemistry , electrolyte , chemistry , physics , photocatalysis , working electrode , engineering , biochemistry , quantum mechanics , electron , organic chemistry
Organolead halide perovskite materials have demonstrated great potential in the solar cells field owing to their excellent optoelectronic properties. However, the instability issue of the perovskites impedes the translation of their attractive features for the solar fuel production such as photoelectrochemical H 2 production from water splitting. Herein, CH 3 NH 3 PbI 3 a photocathode with a sandwich‐like structure is fabricated with a general and scalable approach toward addressing this issue. The photocathode exhibits an onset potential at 0.95 V versus reversible hydrogen electrode (RHE) and a photocurrent density of −18 mA cm −2 at 0 V versus RHE with an impressive ideal ratiometric power‐saved efficiency of 7.63%. More impressively, the photocathode retains good stability under 12 h continuous illumination in water at wide pH range. This performance is much superior to that of the best perovskite‐based photoelectrode ever reported.