PBS quantum dots embedded TIO2 nanofibers for dye-sensitized solar cells

Prakash Joshi, Lifeng Zhang, Mahbube Siddiki, Hao Fong, Jing Li, David Galipeau, Qiquan Qiao

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We report a new type of dye-sensitized solar cells (DSSCs) fabricated using PbS quantum dots (ODs) embedded TiO2 fibers as the photoanodes. ODs have shown great potential as an efficient light absorbing material with very high extinction coefficient. However, to obtain an efficient photoinduced charge transfer from ODs to TiO2, a stable linker is needed to attach QDs to TiO2. Unlike Ru based or all-organic dyes having a carboxylic group to function as the linker, it is a challenge to establish a strong attachment between QDs and TiO2. In this work, we used electrospinning technique to form TiO2 nanofibers embedded with PbS ODs without the need of a carboxylic group or any other linker. The ODs embedded TiO2 nanofibers were mixed with an organic binder and then deposited onto fluorine-doped tin dioxide (FTO) glass substrates by doctor blading. To harvest both visible and infrared light, the photoanodes were further sensitized with a Ru complex dye (Z-907). DSSC devices were fabricated using platinum as a counter-electrode catalyst for triiodide reduction. The cells achieved overall energy conversion efficiency of 2.8 % with Voc =0.81V and FF=0.61 under illumination of 100 mW/cm2 with an AM 1.5 filter.

Original languageEnglish (US)
Title of host publication2009 34th IEEE Photovoltaic Specialists Conference, PVSC 2009
Pages584-587
Number of pages4
DOIs
StatePublished - 2009
Externally publishedYes
Event2009 34th IEEE Photovoltaic Specialists Conference, PVSC 2009 - Philadelphia, PA, United States
Duration: Jun 7 2009Jun 12 2009

Publication series

NameConference Record of the IEEE Photovoltaic Specialists Conference
ISSN (Print)0160-8371

Conference

Conference2009 34th IEEE Photovoltaic Specialists Conference, PVSC 2009
CountryUnited States
CityPhiladelphia, PA
Period6/7/096/12/09

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering

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