Title :
Piezoelectric photoacoustic spectra of bulk CuInS2 single crystals grown by the traveling heater method
Author :
Yoshino, Kenji ; Nishimoto, Masayuki ; Fukuyama, Atsuhiko ; Yokoyama, Hirosumi ; Maeda, Kouji ; Miyake, Hideto ; Sugiyama, Koichi ; Ikari, Tetsuo
Author_Institution :
Dept. of Electr. & Electron. Eng., Miyazaki Univ., Japan
Abstract :
The piezoelectric photoacoustic (PPA) spectra of bulk CuInS2 single crystals grown by a traveling heater method were observed at 80 K. Two PPA signals which are due to bandgap energy and an intrinsic defect are clearly observed. The activation energy of the intrinsic defect is estimated to be about 70 meV are obtained as nonradiative recombination centers for the first time
Keywords :
copper compounds; energy gap; indium compounds; photoacoustic spectra; piezo-optical effects; piezoelectric semiconductors; ternary semiconductors; 80 K; CuInS2; activation energy; bandgap energy; bulk CuInS2 single crystals; intrinsic defect; nonradiative recombination centers; piezoelectric photoacoustic spectra; traveling heater method; Acoustic measurements; Crystals; Electron optics; Frequency modulation; Photonic band gap; Probes; Radiative recombination; Spectroscopy; Ultrasonic variables measurement; X-ray scattering;
Conference_Titel :
Ultrasonics Symposium, 1998. Proceedings., 1998 IEEE
Conference_Location :
Sendai
Print_ISBN :
0-7803-4095-7
DOI :
10.1109/ULTSYM.1998.765063
