Carrier multiplication in a PbSe nanocrystal and P3HT/PCBM tandem cell

Sung Jin Kim, Won Jin Kim, Alexander N. Cartwright, Paras N. Prasad

Research output: Contribution to journalArticle

55 Scopus citations

Abstract

Photoactivation of multiple carrier charge extraction in a tandem cell configuration is demonstrated. An all-solution-processed tandem photovoltaic structure, consisting of a hydrazine treated PbSe nanocrystal film and a P3HT/PCBM bulk-heterojunction solar cell, was fabricated. The PbSe nanocrystal film was used as the top cell to predominantly absorb short wavelength light (UV/blue). The lower P3HT/PCBM cell absorbed the remaining solar energy and supplied photocurrent as well as an electric field that extracts the photogenerated charge from the PbSe layer. Carrier multiplication from excitation of the PbSe film with high energy photons was quantified by selective light bias activation measurements.

Original languageEnglish (US)
Article number191107
JournalApplied Physics Letters
Volume92
Issue number19
DOIs
StatePublished - May 27 2008
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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