Integrated Photoelectrolysis of Water Implemented On Organic Metal Halide Perovskite Photoelectrode.
Herein we report on integrated photoelectrolysis of water employing organic metal halide (OMH) perovskite material. Generic OMH perovskite material and device architecture are highly susceptible to degradation by moisture and water. We found that decomposition of perovskite devices proceeds by water ingress through pinholes in upper layers and is strongly affected by applied bias/light and electrolyte pH. It was also found that a pinhole-free hole transport layer (HTL) could significantly enhance the stability of the perovskite photoelectrode, thereby extending the photoelectrode lifetime to several tens of minutes, which is an unprecedented record-long operation. Furthermore, a carbon nanotube (CNT)/polymer composite layer was developed that can effectively protect the underlying perovskite layer from electrolyte molecules.
Department of Applied Chemistry, and §Department of IT Convergence, Kumoh National Institute of Technology , Gumi, 730-701, Republic of Korea.
Minh Tam
MT
Hoang
Department of Applied Chemistry, and §Department of IT Convergence, Kumoh National Institute of Technology , Gumi, 730-701, Republic of Korea.
Ngoc Duy
ND
Pham
Department of Applied Chemistry, and §Department of IT Convergence, Kumoh National Institute of Technology , Gumi, 730-701, Republic of Korea.
Ji Hun
JH
Han
Department of Chemistry, Division of Applied Physical Chemistry, School for Chemical Sciences, KTH Royal Institute of Technology , Teknikringen 30, SE-114 28 Stockholm, Sweden.
James M
JM
Gardner
Department of Applied Chemistry, and §Department of IT Convergence, Kumoh National Institute of Technology , Gumi, 730-701, Republic of Korea.
Ilwhan
I
Oh
perovskite; photoanode; photoelectrochemistry; solar energy; water photolysis