Title :
The investigation of TCO/CdS/CdTe heterojunctions by C-U and C-f measurements: Experiment and modeling
Author :
Rotaru, Constantin ; Vatavu, S. ; Fedorov, Vladimir ; Gasin, Petru ; Lux-Steiner, Martha ; Ferekides, C. ; Rusu, Mirabela
Author_Institution :
Fac. of Phys. & Eng., Moldova State Univ., Chisinau, Moldova
Abstract :
The paper presents the analysis of C-U and C-f data obtained in the 1 kHz-10 MHz range for CdS/CdTe heterojunctions prepared by CSS onto (ZnO:Al, ZnO:Al/i-ZnO)/Glass substrates. An attempt to model the physical properties of the heterojunctions is made. A small signal analysis has been carried out to establish the equivalent circuit of device. The unusual capacitance behavior of the ZnO based heterojunction is attributed to presence of the barrier at the back contact.
Keywords :
II-VI semiconductors; cadmium compounds; equivalent circuits; semiconductor device models; solar cells; zinc compounds; C-f measurements; CdS-CdTe; ZnO:Al; back contact; capacitance-voltage characteristics; equivalent circuit; glass substrates; heterojunction model; small signal analysis; transparent conductive oxide; Capacitance; Equivalent circuits; Heterojunctions; Nickel; Photovoltaic cells; Physics; Zinc oxide; cadmium compounds; capacitance; capacitance-voltage characteristics; heterojunction; photovoltaic cells; semiconductor device modeling;
Conference_Titel :
Photovoltaic Specialists Conference (PVSC), 2013 IEEE 39th
Conference_Location :
Tampa, FL
DOI :
10.1109/PVSC.2013.6744872
