Efficient light harvesting and carrier transport in PbS quantum dots/silicon nanotips heterojunctions

Chun Ying Huang, Di Yan Wang, Chun Hsiung Wang, Yaw Tyng Wang, You Ting Jiang, Ying Jay Yang, Chia Chun Chen, Yang Fang Chen

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17 Citations (Scopus)


Light harvesting from nanocomposites consisting of silicon (Si) nanotips and PbS quantum dots (QDs) has been investigated. We show that Si nanotips provide direct carrier transport paths, additional interfacial area and light trapping. We observe that there is a dramatic enhancement in short-circuit current (from 9.34 to 14.17mAcm-2) with nanotips structure than that of the bulk Si wafer. In addition, with an additional electron blocking layer, the photovoltaic performance can be further increased. The nanocomposites consisting of QDs and Si nanotips therefore open a promising route for efficient light harvesting from visible to infrared with improved power conversion efficiency.

Original languageEnglish
Article number085103
JournalJournal of Physics D: Applied Physics
Issue number8
Publication statusPublished - 2011 Mar 2


ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Surfaces, Coatings and Films

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