DataVXACS Applied Energy MaterialsPaper
journal article·2020-02-24

Effect of Alkali Treatment on Photovoltaic Performances of Cu(In,Ga)(S,Se)2 Solar Cells and Their Absorber Quality Analyzed by Urbach Energy and Carrier Recombination Rates

Jakapan Chantana, Yu Kawano, Takahito Nishimura, Yoshinori Kimoto, Takuya Kato, Hiroki Sugimoto, Takashi Minemoto

ACS Applied Energy Materials· Volume 3· Issue 2
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Source abstract

Abstract

Cd-free Cu(In,Ga)(S,Se)2 (CIGSSe) solar cells are fabricated by all-dry process, where CIGSSe absorbers with and without alkali (K and Cs) treatments are used. Urbach energy (EU) is estimated in long-wavelength edge of external quantum efficiency. It is revealed that reduced EU through K and Cs treatments yields decreased open-circuit voltage deficit. Carrier recombination rates across devices are reduced through K and Cs treatments, corresponding to increased carrier lifetimes and decreased EU. Conversion efficiency of Cd-free CIGSSe solar cells with a structure of glass/Mo/CIGSSe/Zn0.8Mg0.2O/Zn0.9Mg0.1O:Al is enhanced from about 17.8% (none alkali) to 18.5% (with K) and to 20.3% (with Cs).
Source: openalex_inverted_index · Quality: baseline

Research context

Ceramics & glassesElectronic materials

OpenAlex topics: Chalcogenide Semiconductor Thin Films · Quantum Dots Synthesis And Properties · Semiconductor materials and interfaces

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

Affiliations

Department of Electrical and Electronic Engineering, Ritsumeikan University, 1-1-1 Nojihigashi, Kusatsu, Shiga 525-8577, Japan

Research Organization of Science and Technology, Ritsumeikan University, 1-1-1 Nojihigashi, Kusatsu, Shiga 525-8577, Japan

Ritsumeikan Global Innovation Research Organization, Ritsumeikan University, 1-1-1 Nojihigashi, Kusatsu, Shiga 525-8577, Japan

Atsugi Research Center, Advanced Technology Research Laboratories, Idemitsu Kosan Co., Ltd., Atsugi, Kanagawa 243-0206, Japan

Funding

New Energy and Industrial Technology Development Organization

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