Using high haze (> 90%) light-trapping film to enhance the efficiency of a-Si:H solar cells

Wei Ping Chu, Jian Shian Lin, Tien Chai Lin, Yu Sheng Tsai, Chen Wei Kuo, Ming Hua Chung, Tsung-Eong Hsien, Lung Chang Liu, Fuh Shyang Juang*, Nien Po Chen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


The high haze light-trapping (LT) film offers enhanced scattering of light and is applied to a-Si:H solar cells. UV glue was spin coated on glass, and then the LT pattern was imprinted. Finally, a UV lamp was used to cure the UV glue on the glass. The LT film effectively increased the Haze ratio of glass and decreased the reflectance of a-Si:H solar cells. Therefore, the photon path length was increased to obtain maximum absorption by the absorber layer. High Haze LT film is able to enhance short circuit current density and efficiency of the device, as partial composite film generates broader scattering light, thereby causing shorter wave length light to be absorbed by the P layer so that the short circuit current density decreases. In case of lab-made a-Si:H thin film solar cells with v-shaped LT films, superior optoelectronic performances have been found (V oc = 0.74 V, J sc = 15.62 mA/cm 2, F.F. = 70%, and η = 8.09%). We observed ~ 35% enhancement of the short-circuit current density and ~ 31% enhancement of the conversion efficiency.

Original languageEnglish
Pages (from-to)3325-3328
Number of pages4
JournalOptics Communications
Issue number15
StatePublished - 1 Jul 2012


  • a-Si:H thin film solar cells
  • Haze
  • Imprint
  • Light trapping film

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