J. Semicond. > Volume 31 > Issue 8 > Article Number: 083003

Effect of bath temperature on the properties of CuInxGa1–x Se2 thin films grown by the electrodeposition technique

Cao Jie , Qu Shengchun , Liu Kong and Wang Zhanguo

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Abstract: Electrodeposition is a promising and low cost method to synthesize CuInxGa1-xSe2 (CIGS)thin films as an absorber layer for solar cells. The effect of bath temperature on the properties of CIGS thin films was investigated in this paper. CIGS films of 1 μ m thickness were electrodeposited potentiostatically from aqueous solution, containing trisodium citrate as a complexing agent, on Mo/glass substrate under a voltage of –0.75 V, and bath temperatures were varied from 20 to 60oC. The effects of bath temperature on the properties of CIGS thin films were characterized by X-ray diffraction (XRD) and scanning electron microscopy. XRD revealed the presence of the CuIn0.7Ga0.3Se2 phase, the optimal phase for application in solar cells. The grain dimensions and crystallizability increase along with the increase of the bath temperature, and the films become stacked and homogeneous. There were few changes in surface morphology and the composition of the films.

Key words: CuInGaSe2

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Cao J, Qu S C, Liu K, Wang Z G. Effect of bath temperature on the properties of CuInxGa1–x Se2 thin films grown by the electrodeposition technique[J]. J. Semicond., 2010, 31(8): 083003. doi: 10.1088/1674-4926/31/8/083003.

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History

Manuscript received: 18 August 2015 Manuscript revised: 19 March 2010 Online: Published: 01 August 2010

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