Cited 0 time in
Cited 0 time in
Characterization of in-situ annealed sub-micron thick Cu(In,Ga)Se-2 thin films
- Characterization of in-situ annealed sub-micron thick Cu(In,Ga)Se-2 thin films
- Ko, Byoung-Soo; Sung, Shi-Joon; Hwang, Dae-Kue
- DGIST Authors
- Sung, Shi-Joon; Hwang, Dae-Kue
- Issue Date
- Thin Solid Films, 590, 330-334
- Article Type
- Article; Proceedings Paper
- Annealing; Annealing Process; Co-Evaporation; Co-Evaporations; Cobalt; Copper; Copper Indium Gallium Selenide; Evaporation; Gallium; Gallium Alloys; Gallium Selenides; In-Situ Annealing; Open Circuit Voltage; Reverse-Saturation Currents; Scanning Electron Microscopy; Selenium Compounds; Semiconducting Selenium Compounds; Single-Stage Deposition; Single Stage; Soda Lime Glass Substrate; Solar Cells; Sub-Micron Films; Substrates; Thin-Films; X Ray Diffraction
- Sub-micron thick Cu(In,Ga)Se2 (CIGS) thin films were deposited on Mo-coated soda-lime glass substrates under various conditions by single-stage co-evaporation. Generally, the short circuit current (Jsc) decreased with the decreasing thickness of the absorber layer. However, in this study, Jsc was nearly unchanged with decreasing thickness, while the open circuit voltage (Voc) and fill factor (FF) decreased by 31.9 and 31.1%, respectively. We believe that the remarkable change of Voc and FF can be attributed to the difference in the total amount of injected thermal energy. Using scanning electron microscopy, we confirmed that the surface morphology becomes smooth and the grain size increased after the annealing process. In the X-ray diffraction patterns, the CIGS thin film also showed an improved crystal quality. We observed that the electric properties were improved by the in-situ annealing of CIGS thin films. The reverse saturation current density of the annealed CIGS solar cell was 100 times smaller than that of reference solar cell. Thus, sub-micron CIGS thin films annealed under a constant Se rate showed a 64.7% improvement in efficiency. © 2015 Elsevier B.V.
- Related Researcher
There are no files associated with this item.
- Convergence Research Center for Solar Energy1. Journal Articles
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.