PbSe nanocrystal/conducting polymer solar cells with an infrared response to 2 micron

Xiaomei Jiang, Richard D Schaller, Sergey B. Lee, Jeffrey M. Pietryga, Victor I Klimov, Anvar A. Zakhidov

Research output: Contribution to journalArticle

92 Citations (Scopus)

Abstract

We investigated the photovoltaic response of nanocomposites made of colloidal, infrared-sensitive, PbSe nanocrystals (NCs) of various sizes and conjugated polymers of either regioregular poly (3-hexylthiophene) (RR-P3HT) or poly-(2-methoxy-5-(2-ethylhexoxy)-1,4-phenylene vinylene) (MEH-PPV). The conduction and valence energy levels of PbSe NCs were determined by cyclic voltammetry and revealed type II heterojunction alignment with respect to energy levels in RR-P3HT for smaller NC sizes. Devices composed of NCs and RR-P3HT show good diode characteristics and sizable photovoltaic response in a spectral range from the ultraviolet to the infrared. Using these materials, we have observed photovoltaic response at wavelengths as far to the infrared as 2 μm (0.6 eV), which is desirable due to potential benefits of carrier multiplication (or multi-exciton generation) from a single junction photovoltaic. Under reverse bias, the devices also exhibit good photodiode responses over the same spectral region.

Original languageEnglish
Pages (from-to)2204-2210
Number of pages7
JournalJournal of Materials Research
Volume22
Issue number8
DOIs
Publication statusPublished - Aug 2007

Fingerprint

Conducting polymers
conducting polymers
Nanocrystals
nanocrystals
solar cells
Infrared radiation
Electron energy levels
energy levels
Conjugated polymers
Photodiodes
multiplication
Excitons
Cyclic voltammetry
photodiodes
Heterojunctions
heterojunctions
Nanocomposites
nanocomposites
Diodes
diodes

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

PbSe nanocrystal/conducting polymer solar cells with an infrared response to 2 micron. / Jiang, Xiaomei; Schaller, Richard D; Lee, Sergey B.; Pietryga, Jeffrey M.; Klimov, Victor I; Zakhidov, Anvar A.

In: Journal of Materials Research, Vol. 22, No. 8, 08.2007, p. 2204-2210.

Research output: Contribution to journalArticle

Jiang, Xiaomei ; Schaller, Richard D ; Lee, Sergey B. ; Pietryga, Jeffrey M. ; Klimov, Victor I ; Zakhidov, Anvar A. / PbSe nanocrystal/conducting polymer solar cells with an infrared response to 2 micron. In: Journal of Materials Research. 2007 ; Vol. 22, No. 8. pp. 2204-2210.
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