Large Efficiency Improvement in Cu 2 ZnSnSe 4  Solar Cells by Introducing a Superficial Ge Nanolayer | Zendy

Giraldo Sergio | Zendy; Neuschitzer Markus | Zendy; Thersleff Thomas | Zendy; LópezMarino Simón | Zendy; Sánchez Yudania | Zendy; Xie Haibing | Zendy; Colina Mónica | Zendy; Placidi Marcel | Zendy; Pistor Paul | Zendy; IzquierdoRoca Victor | Zendy; Leifer Klaus | Zendy; PérezRodríguez Alejandro | Zendy; Saucedo Edgardo | Zendy

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Large Efficiency Improvement in Cu 2 ZnSnSe 4 Solar Cells by Introducing a Superficial Ge Nanolayer

Author(s) -

Giraldo Sergio,

Neuschitzer Markus,

Thersleff Thomas,

LópezMarino Simón,

Sánchez Yudania,

Xie Haibing,

Colina Mónica,

Placidi Marcel,

Pistor Paul,

IzquierdoRoca Victor,

Leifer Klaus,

PérezRodríguez Alejandro,

Saucedo Edgardo

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.201501070

Subject(s) - materials science , solar cell , germanium , solar cell efficiency , energy conversion efficiency , nanotechnology , chemical engineering , optoelectronics , engineering physics , silicon , physics , engineering

A large improvement in Cu 2 ZnSnSe 4 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 GeO x nanoinclusions, which lead to an impressive solar cell ( V OC ) increase.

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