Large Efficiency Improvement in Cu2ZnSnSe4 Solar Cells by Introducing a Superficial Ge Nanolayer. Issue 21 (7th August 2015)

• Record Type: Journal Article
• Authors: Giraldo, Sergio; Neuschitzer, Markus; Thersleff, Thomas; López‐Marino, Simón; Sánchez, Yudania; Xie, Haibing; Colina, Mónica; Placidi, Marcel; Pistor, Paul; Izquierdo‐Roca, Victor; Leifer, Klaus; Pérez‐Rodríguez, Alejandro; Saucedo, Edgardo
• Is Part Of: Advanced energy materials. Volume 5:Issue 21(2015:Nov.)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2015-08-07
• Subjects: Cu2ZnSnSe4 -- Ge nanolayers -- kesterite -- thin film solar cells; Energy harvesting -- Materials -- Periodicals; Energy conversion -- Materials -- Periodicals; Energy storage -- Materials -- Periodicals; Photovoltaics -- Periodicals; Fuel cells -- Periodicals; Thermoelectric materials -- Periodicals; 621.31
• DOI: 10.1002/aenm.201501070
• Languages: English
• ISSNs: 1614-6832

Abstract

Abstract : A large improvement in Cu2 ZnSnSe4 solar cell efficiency is presented based on the introduction of a Ge superficial nanolayer. This improvement is explained by three complementary effects: the formation of a liquid Ge‐related phase, the possible reduction of Sn multicharge states, and the formation of GeOx nanoinclusions, which lead to an impressive solar cell ( V OC ) increase.