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Photoinduced electron transfer

About: Photoinduced electron transfer is a(n) research topic. Over the lifetime, 5932 publication(s) have been published within this topic receiving 212546 citation(s).

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Open accessJournal ArticleDOI: 10.1126/SCIENCE.270.5243.1789
G. Yu1, Jun Gao1, Jan C. Hummelen1, Fred Wudl1  +1 moreInstitutions (1)
15 Dec 1995-Science
Abstract: The carrier collection efficiency (ηc) and energy conversion efficiency (ηe) of polymer photovoltaic cells were improved by blending of the semiconducting polymer with C60 or its functionalized derivatives. Composite films of poly(2-methoxy-5-(2′-ethyl-hexyloxy)-1,4-phenylene vinylene) (MEH-PPV) and fullerenes exhibit ηc of about 29 percent of electrons per photon and ηe of about 2.9 percent, efficiencies that are better by more than two orders of magnitude than those that have been achieved with devices made with pure MEH-PPV. The efficient charge separation results from photoinduced electron transfer from the MEH-PPV (as donor) to C60 (as acceptor); the high collection efficiency results from a bicontinuous network of internal donor-acceptor heterojunctions.

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9,119 Citations


Journal ArticleDOI: 10.1126/SCIENCE.258.5087.1474
27 Nov 1992-Science
Abstract: Evidence for photoinduced electron transfer from the excited state of a conducting polymer onto buckminsterfullerene, C(60), is reported. After photo-excitation of the conjugated polymer with light of energy greater than the pi-pi* gap, an electron transfer to the C(60) molecule is initiated. Photoinduced optical absorption studies demonstrate a different excitation spectrum for the composite as compared to the separate components, consistent with photo-excited charge transfer. A photoinduced electron spin resonance signal exhibits signatures of both the conducting polymer cation and the C(60) anion. Because the photoluminescence in the conducting polymer is quenched by interaction with C(60), the data imply that charge transfer from the excited state occurs on a picosecond time scale. The charge-separated state in composite films is metastable at low temperatures.

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Topics: Photoinduced electron transfer (69%), Electron transfer (59%), Excited state (56%) ...read more

3,902 Citations


Journal ArticleDOI: 10.1002/ANIE.200702506
01 Jan 2008-Angewandte Chemie
Abstract: Fossil fuel alternatives, such as solar energy, are moving to the forefront in a variety of research fields. Polymer-based organic photovoltaic systems hold the promise for a cost-effective, lightweight solar energy conversion platform, which could benefit from simple solution processing of the active layer. The function of such excitonic solar cells is based on photoinduced electron transfer from a donor to an acceptor. Fullerenes have become the ubiquitous acceptors because of their high electron affinity and ability to transport charge effectively. The most effective solar cells have been made from bicontinuous polymer–fullerene composites, or so-called bulk heterojunctions. The best solar cells currently achieve an efficiency of about 5 %, thus significant advances in the fundamental understanding of the complex interplay between the active layer morphology and electronic properties are required if this technology is to find viable application.

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Topics: Hybrid solar cell (68%), Polymer solar cell (66%), Organic solar cell (64%) ...read more

3,800 Citations


Open accessJournal ArticleDOI: 10.1002/1616-3028(200102)11:1<15::AID-ADFM15>3.0.CO;2-A
Abstract: Recent developments in conjugated-polymer-based photovoltaic elements are reviewed. The photophysics of such photoactive devices is based on the photo-induced charge transfer from donor-type semiconducting conjugated polymers to acceptor-type conjugated polymers or acceptor molecules such as Buckminsterfullerene, C60. This photo-induced charge transfer is reversible, ultrafast (within 100 fs) with a quantum efficiency approaching unity, and the charge-separated state is metastable (up to milliseconds at 80 K). Being similar to the first steps in natural photosynthesis, this photo-induced electron transfer leads to a number of potentially interesting applications, which include sensitization of the photoconductivity and photovoltaic phenomena. Examples of photovoltaic architectures are presented and their potential in terrestrial solar energy conversion discussed. Recent progress in the realization of improved photovoltaic elements with 3 % power conversion efficiency is reported.

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3,729 Citations



Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20226
2021186
2020178
2019193
2018185
2017206

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Topic's top 5 most impactful authors

Shunichi Fukuzumi

211 papers, 10.9K citations

Osamu Ito

134 papers, 5.5K citations

Francis D'Souza

59 papers, 3.3K citations

Mamoru Fujitsuka

54 papers, 1.5K citations

Michael R. Wasielewski

45 papers, 5.2K citations

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