Photovoltaic cells made with organic composites

Journal Article · Tue Apr 01 00:00:00 EST 1997 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.53478· OSTI ID:613937

Yu, G ^[1]; Gao, J; Yang, C ^[2]; Heeger, A J ^[1]

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1. UNIAX Corporation, 6780 Cortona Drive, Santa Barbara, California 93117 (United States)
2. Institute for Polymers and Organic Solids, University of California, Santa Barbara, California 93106 (United States)

Blending organic semiconductors with different electron affinities results in an interpenetrating bi-continuous network of internal donor/acceptor (D/A) heterojunctions. The nano-scale D/A junctions show efficient charge separation and charge transfer. The bi-continuous network allow the separated carriers to be collected effectively at the anode and cathode contacts. These blends are soluble to common organic solvents, and are processable at room temperature. Photodiodes and photovoltaic cells were fabricated with high quantum efficiencies. The carrier collection efficiency and energy conversion efficiency of MEH-PPV:C{sub 60} photovoltaic cells are {approximately}29{percent} electrons/photon and {approximately}3{percent} under illumination of 20mW/cm{sup 2} at 430 nm, two orders of magnitude higher than that in devices with MEH-PPV alone. The photosensitivity and the quantum yields increase to 0.26 A/W and {approximately}75{percent} electrons/photon at reverse bias of {minus}2V, even higher than those in UV-enhanced Si photodiodes at the same wavelength. {copyright} {ital 1997 American Institute of Physics.}

• Sponsoring Organization: USDOE
• DOE Contract Number: FG03-93ER12138
• OSTI ID: 613937
• Report Number(s): CONF-970396--
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 404; ISSN 0094-243X; ISSN APCPCS
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
ELECTRIC CONDUCTIVITY
ELECTRONIC STRUCTURE
FABRICATION
ORGANIC SEMICONDUCTORS
PHOTOVOLTAIC CELLS
QUANTUM EFFICIENCY
SOLAR CELLS
SOLAR ENERGY CONVERSION
TRANSMISSION ELECTRON MICROSCOPY