Cd-rich and Te-rich low-temperature photoluminescence in cadmium telluride

被引：25

作者：

Albin, D. S. ^{[1
]}

Kuciauskas, D. ^{[1
]}

Ma, J. ^{[1
]}

Metzger, W. K. ^{[1
]}

Burst, J. M. ^{[1
]}

Moutinho, H. R. ^{[1
]}

Dippo, P. C. ^{[1
]}

机构：

[1] Natl Renewable Energy Lab, Golden, CO 80401 USA

来源：

APPLIED PHYSICS LETTERS | 2014年 / 104卷 / 09期

关键词：

SOLAR-CELLS; EFFICIENCY;

D O I：

10.1063/1.4867533

中图分类号：

O59 [应用物理学];

学科分类号：

070305 [高分子化学与物理];

摘要：

Low-temperature photoluminescence emission spectra were measured in cadmium telluride (CdTe) samples in which composition was varied to promote either Cd or Te-rich stoichiometry. The ability to monitor stoichiometry is important, since it has been shown to impact carrier recombination. Te-rich samples show transitions corresponding to acceptor-bound excitons (similar to 1.58 eV) and free-electron to acceptor transitions (similar to 1.547 eV). In addition to acceptor-bound excitons, Cd-rich samples show transitions assigned to donor-bound excitons (1.591 eV) and Te vacancies at 1.552 eV. Photoluminescence is a noninvasive way to monitor stoichiometric shifts induced by post-deposition anneals in polycrystalline CdTe thin films deposited by close-spaced sublimation. (C) 2014 AIP Publishing LLC.

引用

页数：4

共 21 条

[1]

[Anonymous], GDMS MEAS PERF I NAT

[2]

GROWTH OF CDTE-FILMS BY CLOSE-SPACED VAPOR TRANSPORT [J].