DataVXACS Applied Energy MaterialsPaper
journal article·2020-03-23

Unassisted Water Splitting Exceeding 9% Solar-to-Hydrogen Conversion Efficiency by Cu(In, Ga)(S, Se)2 Photocathode with Modified Surface Band Structure and Halide Perovskite Solar Cell

Bonhyeong Koo, Daehan Kim, Passarut Boonmongkolras, Seong Ryul Pae, Segi Byun, Jekyung Kim, June Hyuk Lee, Dong Hoe Kim, Suncheul Kim, Byung Tae Ahn, Sung-Wook Nam, Byungha Shin

ACS Applied Energy Materials· Volume 3· Issue 3
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Source abstract

Abstract

By introducing ZnS between Cu(In, Ga)(S,Se)2 (CIGS) and the CdS, we greatly improved the photoelectrochemical (PEC) performance of the CIGS photocathode for hydrogen evolution. Chemical and structural analysis reveals that the enhanced performance is due to additional band bending driven by in-diffusion of Zn into the CIGS and suppression of nonradiative recombination. The improved onset potential of CIGS photocathode was exploited by building a tandem device with a perovskite absorber for bias-free water splitting. A PEC device with a solar-to-hydrogen conversion efficiency exceeding 9% (the highest among PEC cells including a CIGS photocathode) with a stable operation of 6.5 h is demonstrated.
Source: openalex_inverted_index · Quality: baseline

Research context

Electronic materials

OpenAlex topics: Chalcogenide Semiconductor Thin Films · Advanced Photocatalysis Techniques · Perovskite Materials and Applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea

Center for Energy Efficiency and Materials, Korea Institute of Energy Research, Daejeon 34129, Republic of Korea

Neutron Science Division, Korea Atomic Energy Research Institute, Daejeon 34057, Republic of Korea

Department of Nanotechnology & Advanced Materials Engineering, Sejong University, Seoul 05006, Republic of Korea

Memory Thin Film Technology, Memory Manufacturing Operation Center, Samsung Electronics, Hwaseong 18448, Republic of Korea

School of Medicine, Kyungpook National University, Daegu 41405, Republic of Korea

Funding

National Research Foundation

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