Hybrid solar cells based on tetrapod nanocrystals: The effects of compositions and type II heterojunction on hybrid solar cell performance

Hyunju Lee, Sungwon Kim, Won Suk Chung, Kyungkon Kim, Donghwan Kim

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

We synthesized oleic acid capped tetrapod nanocrystals of CdSe, CdTe and type II heterostructured CdTe/CdSe to investigate the effects of nanocrystal compositions and type II heterojunction on the photovoltaic properties of hybrid solar cells. The hybrid solar cell based on the blend of CdSe tetrapod nanocrystals and P3HT with a weight ratio of 6:1 showed the maximum power conversion efficiency of 1.03% under AM 1.5 G condition, and the maximum incident photon to current conversion efficiency of the solar cell was 43% at 415 nm. Although CdTe and CdTe/CdSe tetrapod nanocrystals showed relatively poor performance, the power conversion efficiency and the short circuit current density of the hybrid solar cell based on type II heterostructured CdTe/CdSe tetrapod nanocrystals was 4.4 and 3.9 times higher than that of the solar cell based on CdTe tetrapod nanocrystals, respectively. These results can be explained by the effects of nanocrystal compositions and type II heterojunction on the photovoltaic properties of hybrid solar cells.

Original languageEnglish
Pages (from-to)446-452
Number of pages7
JournalSolar Energy Materials and Solar Cells
Volume95
Issue number2
DOIs
Publication statusPublished - 2011 Feb

Keywords

  • CdTe/CdSe tetrapod nanocrystals
  • Hybrid solar cells
  • Oleic acid capped tetrapod nanocrystals
  • P3HT
  • Type ii heterojunction

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films

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