Enhancement of power conversion efficiency in GaAs solar cells with dual-layer quantum dots using flexible PDMS film

Hsin Chu Chen, Chien-Chung Lin*, Hau Vei Han, Kuo Ju Chen, Yu Lin Tsai, Yi An Chang, Min Hsiung Shih, Hao-Chung Kuo, Pei-Chen Yu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

36 Scopus citations

Abstract

This study demonstrates the high performance of GaAs solar cells with dual-layer CdS quantum dots (QDs) carried by flexible polydimethylsiloxane (PDMS) film. Several parameters were enhanced, including the short circuit current, fill factor, and power conversion efficiency, which were measured under white light illumination similar to the solar spectrum. The flexible PDMS film was fabricated using the spin-coating technique, and was then used to embed dual-layer CdS QDs. Different concentrations of QDs were applied in this design to test the optimal combination. The proposed scheme enhances power conversion efficiency by 22%, compared to a GaAs solar cell without CdS QDs. The photon down-conversion capability in the ultraviolet (UV) range and additional anti-reflection capability in the longer visible-IR range were verified through the external quantum efficiency.

Original languageEnglish
Pages (from-to)92-96
Number of pages5
JournalSolar Energy Materials and Solar Cells
Volume104
DOIs
StatePublished - 1 Sep 2012

Keywords

  • Dual-layer
  • GaAs solar cell
  • PDMS
  • Quantum dots

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