Efficiency Enhancement of Silicon Heterojunction Solar Cells via Photon Management Using Graphene Quantum Dot as Downconverters

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review

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Author(s)

  • Meng-Lin Tsai
  • Wei-Chen Tu
  • Libin Tang
  • Tzu-Chiao Wei
  • Wan-Rou Wei
  • Shu Ping Lau
  • Lih-Juann Chen

Detail(s)

Original languageEnglish
Pages (from-to)309-313
Journal / PublicationNano Letters
Volume16
Issue number1
Early online date28 Dec 2015
Publication statusPublished - 13 Jan 2016
Externally publishedYes

Abstract

By employing graphene quantum dots (GQDs), we have achieved a high efficiency of 16.55% in n-type Si heterojunction solar cells. The efficiency enhancement is based on the photon downconversion phenomenon of GQDs to make more photons absorbed in the depletion region for effective carrier separation, leading to the enhanced photovoltaic effect. The short circuit current and the fill factor are increased from 35.31 to 37.47 mA/cm2 and 70.29% to 72.51%, respectively. The work demonstrated here holds the promise for incorporating graphene-based materials in commercially available solar devices for developing ultrahigh efficiency photovoltaic cells in the future.

Research Area(s)

  • graphene, heterojunction, photovoltaic, quantum dot, solar cells

Citation Format(s)

Efficiency Enhancement of Silicon Heterojunction Solar Cells via Photon Management Using Graphene Quantum Dot as Downconverters. / Tsai, Meng-Lin; Tu, Wei-Chen; Tang, Libin; Wei, Tzu-Chiao; Wei, Wan-Rou; Lau, Shu Ping; Chen, Lih-Juann; He, Jr-Hau.

In: Nano Letters, Vol. 16, No. 1, 13.01.2016, p. 309-313.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review