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Cu 2 ZnSnSe 4 Thin‐Film Solar Cells by Thermal Co‐evaporation with 11.6% Efficiency and Improved Minority Carrier Diffusion Length
Author(s) -
Lee Yun Seog,
Gershon Talia,
Gunawan Oki,
Todorov Teodor K.,
Gokmen Tayfun,
Virgus Yudistira,
Guha Supratik
Publication year - 2015
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.201401372
Subject(s) - materials science , photoluminescence , thin film , diffusion , selenide , evaporation , kesterite , microstructure , thin film solar cell , cadmium selenide , solar cell , thermal , optoelectronics , analytical chemistry (journal) , nanotechnology , czts , metallurgy , selenium , quantum dot , chemistry , physics , chromatography , thermodynamics , meteorology
11.6%‐efficiency Cu 2 ZnSnSe 4 (CZTSe) thin‐film solar cells are fabricated via a thermal co‐evaporation method. The CZTSe thin film with improved microstructure exhibits a minority carrier diffusion length over 2 μm, resulting in efficient photogenerated carrier collection in the device. A comparative study of photoluminescence in pure selenide and pure sulfide devices shows reduced band‐tailing for the pure selenide phase.