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Optical Materials Express

Optical Materials Express

  • Editor: David J. Hagan
  • Vol. 3, Iss. 1 — Jan. 1, 2013
  • pp: 54–66

Synthesis of CIGS thin film by solvothermal route

Hsiang-Chen Wang, Chao-Chi Wang, Shih-Wei Feng, Li-His Chen, and Yen-Sheng Lin  »View Author Affiliations

Optical Materials Express, Vol. 3, Issue 1, pp. 54-66 (2013)

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This study presents the synthesis of copper indium gallium (di)selenide (CIGS) films by a solvothermal method. Four factors in CIGS synthesis are considered: In/Ga ratios, hydrogen contents during thermal annealing, thermal annealing temperatures, and annealing times. Experimental results show that the optimal parameters for CIGS film synthesis are the following: proportion of Cu:In:Ga:Se = 1:0.7:0.3:2; hydrogen content during thermal annealing, 5%; thermal annealing temperature, 600 °C; and annealing time, 100 min. The largest crystal grain size of a CIGS film synthesized using these optimal parameters is about 100 nm. The crystal grain size is also found to be inversely proportional to sheet resistance. This relationship holds true because a smaller crystal indicates more grain boundaries and defects. Thus, an electron encounters more barriers in the transmission process, and electric conductivity decreases.

© 2012 OSA

OCIS Codes
(160.2100) Materials : Electro-optical materials
(310.3840) Thin films : Materials and process characterization
(160.5335) Materials : Photosensitive materials

ToC Category:

Original Manuscript: November 20, 2012
Revised Manuscript: December 12, 2012
Manuscript Accepted: December 12, 2012
Published: December 13, 2012

Hsiang-Chen Wang, Chao-Chi Wang, Shih-Wei Feng, Li-His Chen, and Yen-Sheng Lin, "Synthesis of CIGS thin film by solvothermal route," Opt. Mater. Express 3, 54-66 (2013)

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