Novel photovoltaic devices based on donor-acceptor molecular and conducting polymer systems
- Osaka Univ. (Japan). Dept. of Electronic Engineering
- Xerox Webster Research Center, Rochester, NY (United States)
- Uzbekistan Academy of Sciences, Tashkent (Uzbekistan). Dept. of Thermophysics
Interest in organic photocells was significantly renewed a few years ago due to discovery of extremely fast photo-induced charge transfer (CT) from conducting polymer (CP) to fullerene C{sub 60} molecules in CP(C{sub 60}) composites. This allowed creation of interfacial junction photocells with relatively high efficiencies. It has been recognized that those are not conventional p/n type semiconducting junction devices, but are so called donor-acceptor (D-A) photocells, reminiscent of reaction centers of natural photosynthetic systems. Even more efficient photovoltaic devices have recently been fabricated with interpenetrating D-A networks which allow electron-hole separation to take place throughout the bulk of the device. In the present paper the authors demonstrate how these photocells can be further improved; they describe new experimental results, give general discussion of the efficiency of such devices, and analyze strategies for design of better D-A type photocells. Their recent experimental results on sensitization by inserting an excitonic layer between donor and acceptor layers multilayered structures, and by doping the D-layer by A-molecules in D(A)/A cells are briefly discussed.
- OSTI ID:
- 532977
- Journal Information:
- IEEE Transactions on Electron Devices, Vol. 44, Issue 8; Other Information: PBD: Aug 1997
- Country of Publication:
- United States
- Language:
- English
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