The effect of Ag alloying of Cu2(Zn,Cd)SnS4 on the monograin powder properties and solar cell performance

被引：31

作者：

Timmo, Kristi ^{[1
]}

Altosaar, Mare ^{[1
]}

Pilvet, Maris ^{[1
]}

Mikli, Valdek ^{[1
]}

Grossberg, Maarja ^{[1
]}

Danilson, Mati ^{[1
]}

Raadik, Taavi ^{[1
]}

Josepson, Raavo ^{[2
]}

Krustok, Jueri ^{[2
]}

Kauk-Kuusik, Marit ^{[1
]}

机构：

[1] Tallinn Univ Technol, Dept Mat & Environm Technol, Ehitajate Tee 5, EE-19086 Tallinn, Estonia

[2] Tallinn Univ Technol, Div Phys, Ehitajate Tee 5, EE-19086 Tallinn, Estonia

来源：

JOURNAL OF MATERIALS CHEMISTRY A | 2019年 / 7卷 / 42期

关键词：

TEMPERATURE-DEPENDENCE; LAYER; CONDUCTIVITY; ELIMINATION; EFFICIENCY; GROWTH; PHASE;

D O I：

10.1039/c9ta07768e

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Cation substitution in Cu2ZnSn(S,Se)(4) offers a path to improved solar cell device performance through the modification of the structural, optical and electrical properties of the absorber material. In the present study, the effect of partial substitution of copper with silver in Cu-1.85(Zn0.8Cd0.2)(1.1)SnS4 monograin powders was investigated. (Cu1-xAgx)(1.85)(Zn0.8Cd0.2)(1.1)SnS4 (ACZCTS) monograin powders with different ratios of [Ag]/([Cu] + [Ag]) were synthesized from CuS, Ag2S, ZnS, CdS, SnS and elemental sulfur in the liquid phase of KI as the flux material in evacuated quartz ampoules at 740 degrees C. EDX analysis of the as-grown materials in the entire series revealed that the Ag concentration was different in the synthesized materials than in the corresponding precursor mixtures. Furthermore, the Ag concentration at the surface of crystals was found to be higher than in the bulk of crystals. By increasing the input Ag content, the shape of grown crystals changed from sharp edged tetragonal to a more rounded form. Raman spectra showed a shift in the A peak position from 336 to 334 cm(-1) as the Ag content increased in (Cu1-xAgx)(1.85)(Zn0.8Cd0.2)(1.1)SnS4. The changes in the recombination processes were studied by temperature dependent photoluminescence spectroscopy and current-voltage characteristics analysis. It was found that the acceptor concentration in the absorber can be modified by varying the Ag content in ACZCTS. The incorporation of Ag into the Cu-1.85(Zn0.8Cd0.2)(1.1)SnS4 monograin absorber material improved the efficiency of monograin layer solar cells from 6.62% (x = 0) to 8.73% (x = 0.01).

引用

页码：24281 / 24291

页数：11

共 49 条

[11] Crystallographic and optical properties of (Cu, Ag)2ZnSnS4 and (Cu, Ag)2ZnSnSe4 solid solutions [J].