Comparison of fluctuating potentials and donor-acceptor pair transitions in a Cu-poor Cu2ZnSnS4 based solar cell

被引：35

作者：

Teixeira, J. P. ^{[1
,2
]}

Sousa, R. A. ^{[1
,2
]}

Sousa, M. G. ^{[1
,2
]}

da Cunha, A. F. ^{[1
,2
]}

Fernandes, P. A. ^{[1
,2
,3
]}

Salome, P. M. P. ^{[4
]}

Gonzalez, J. C. ^{[5
]}

Leitao, J. P. ^{[1
,2
]}

机构：

[1] Univ Aveiro, Dept Fis, P-3810193 Aveiro, Portugal

[2] Univ Aveiro, I3N, P-3810193 Aveiro, Portugal

[3] Inst Politecn Porto, Inst Super Engn Porto, Dept Fis, P-4200072 Oporto, Portugal

[4] Lab Nanostruct Solar Cells LaNaSC, INL Int Iberian Nanotechnol Lab, P-4715330 Braga, Portugal

[5] Univ Fed Minas Gerais, Dept Fis, BR-30123970 Belo Horizonte, MG, Brazil

来源：

APPLIED PHYSICS LETTERS | 2014年 / 105卷 / 16期

关键词：

THIN-FILMS; RADIATIVE RECOMBINATION; OPTICAL-PROPERTIES; PHOTOLUMINESCENCE; SULFURIZATION; DEPENDENCE; DEFECTS; BAND;

D O I：

10.1063/1.4899057

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The structure of the electronic energy levels of a single phase Cu2ZnSnS4 film, as confirmed by Raman Scattering and x-ray diffraction, is investigated through a dependence on the excitation power of the photoluminescence (PL). The behavior of the observed asymmetric band, with a peak energy at similar to 1.22 eV, is compared with two theoretical models: (i) fluctuating potentials and (ii) donor-acceptor pair transitions. It is shown that the radiative recombination channels in the Cupoor film are strongly influenced by tail states in the bandgap as a consequence of a heavy doping and compensation levels. The contribution of the PL for the evaluation of secondary phases is also highlighted. (C) 2014 AIP Publishing LLC.

引用

页数：4

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