Influence of Synthesis Conditions on the Lifetime of Excess Charge Carriers in Monograin Powders with Kesterite Structure

被引：2

作者：

Gapanovich, M. V. ^{[1
]}

Varseev, D. N. ^{[1
,2
]}

Rabenok, E. V. ^{[1
]}

Golovanov, B. I. ^{[1
]}

Novikov, G. F. ^{[1
,2
]}

机构：

[1] Russian Acad Sci, Inst Problems Chem Phys, Chernogolovka 142432, Moscow Oblast, Russia

[2] Moscow MV Lomonosov State Univ, Moscow 119991, Russia

来源：

HIGH ENERGY CHEMISTRY | 2019年 / 53卷 / 06期

关键词：

monograins; kesterites; microwave photoconductivity; electron lifetime; flux effect; PHOTOCONDUCTIVITY; KINETICS;

D O I：

10.1134/S0018143919060079

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：

By solid-phase synthesis, macrocrystalline Cu2 - delta Zn2 - xSnxS4 - ySey monograin powders have been prepared, the chemical composition of which was shown by XRD and Raman spectroscopy to be different in powder fractions of different sizes formed during the synthesis. The influence of synthesis conditions on the decay kinetics of photogenerated charge carriers in different fractions has been studied using the frequency-time-resolved microwave photoconductivity method. The characteristic photoresponse half-life, tau(1/2), increased with increasing grain size. The smallest values of the lifetime were observed for the fraction with sizes of 50-70 mu m (tau(1/2) <5 ns), and the largest values were for the fraction with a grain size of 70-90 mu m (tau(1/2) similar to 12 ns).

引用

页码：429 / 434

页数：6

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