FIZIKA A 12 (2003) 1 , 15 -22

TIME-RESOLVED PHOTOLUMINESCENCE SPECTRA OF (Al_xGa_1-x)_0.51In_0.49P (x=0.29) ALLOY

YI JUN LU^a,b, YU LIN GAO^a, JIAN SHENG ZHENG^a, ZHI GANG CAI^b,
HAI YU SANG^b and XUE RAN ZENG^b

^aDepartment of Physics, Xiamen University, Xiamen, 361 005, P. R. China
^bState Key Laboratory of Optoelectronic Materials and Technologies,
Zhongshang University, Guangzhou, 510 275, P. R. China

Received 5 December 2001; revised manuscript received 28 April 2003
Accepted 2 June 2003        Online 20 September 2003

Measurements of time-resolved photoluminescence (TRPL) spectra were made in a study of the optical properties of partially ordered quaternary (Al_xGa_1-x)_0.51In_0.49P (x=0.29) alloy. Both excitation-wavelength dependence of lifetime and excitation-intensity dependence of lifetime show a wide distribution of carriers. In TRPL spectra measured at 300 K, a blue-shift of photoluminescence (PL) peaks in (Al_xGa_1-x)_0.51In_0.49P is observed. The phenomenon is in agreement with the Z-shaped temperature dependence of the PL peak. Possible origins of the blue-shift and Z-shaped behaviour of PL peak are presented.

PACS numbers: 78.30.Fs, 78.55.-m, 71.23.-K
UDC 535.37

Keywords: quaternary (Al_xGa_1-x)_0.51In_0.49P alloy, III-V semiconductors, ordered alloys, photoluminescence

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