Light energy conversion using mixed molecular nanoclusters. Porphyrin and C60 cluster films for efficient photocurrent generation

Taku Hasobe, Hiroshi Imahori, Shunichi Fukuzumi, Prashant V. Kamat

Research output: Contribution to journalArticle

143 Citations (Scopus)

Abstract

Composite molecular nanoclusters of fullerene and porphyrin prepared in acetonitrile/toluene mixed solvent absorb light over the entire spectrum of visible light. Upon slow evaporation of the solvent on the copper grid, these mixed nanoclusters undergo close-packed stacking to produce either tubular- or square-shaped microcrystallites and differ from those obtained from single-component clusters. The highly colored composite clusters can be assembled as 3-dimensional arrays onto nanostructured SnO2 films using an electrophoretic deposition approach. The composite cluster films exhibit an incident photon-to-photocurrent efficiency (IPCE) as high as 17% at an applied potential of 0.2 V vs SCE, which is significantly higher than the additive effect observed from either porphyrin (IPCE = 1.6%) or fullerene clusters (IPCE = 5.0%) under similar photoelectrochemical conditions. The high IPCE values observed with porphyrin and C60 clusters demonstrate the synergy of these systems toward yielding efficient photoinduced charge separation within these composite nanoclusters.

Original languageEnglish
Pages (from-to)12105-12112
Number of pages8
JournalJournal of Physical Chemistry B
Volume107
Issue number44
Publication statusPublished - 2003 Nov 6
Externally publishedYes

Fingerprint

Nanoclusters
Porphyrins
energy conversion
nanoclusters
Photocurrents
Energy conversion
porphyrins
photocurrents
Photons
Fullerenes
Composite materials
composite materials
photons
fullerenes
Toluene
Acetonitrile
Copper
polarization (charge separation)
Evaporation
acetonitrile

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Cite this

Light energy conversion using mixed molecular nanoclusters. Porphyrin and C60 cluster films for efficient photocurrent generation. / Hasobe, Taku; Imahori, Hiroshi; Fukuzumi, Shunichi; Kamat, Prashant V.

In: Journal of Physical Chemistry B, Vol. 107, No. 44, 06.11.2003, p. 12105-12112.

Research output: Contribution to journalArticle

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