Investigations of the polymer alignment, the nonradiative resonant energy transfer, and the photovoltaic response of poly(3-hexylthiophene)/TiO{sub 2} hybrid solar cells

Journal Article · Sun Aug 15 00:00:00 EDT 2010 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3459889· OSTI ID:21476434

Park, Young Ran ^[1]; Lee, You-Jin; Yu, Chang-Jae; Kim, Jae-Hoon ^[2]

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1. Department of Electronics and Computer Engineering, Research Institute of Information Display, Hanyang University, Seoul 133-791 (Korea, Republic of)
2. Department of Information Display Engineering, Department of Electronics and Computer Engineering, Hanyang University, Seoul 133-791 (Korea, Republic of)

We report the effects of annealing on the performance of hybrid photovoltaic (PV) cells containing poly(3-hexylthiophene) (P3HT) coated onto TiO{sub 2}/Sn doped In{sub 2}O{sub 3} (ITO) and ITO substrates. In the optimized device, which exhibits a higher efficiency, the backbone axes of the P3HT chains were found to lie within the substrate plane, their conjugated planes are slightly tilted, and their side chains are substantially tilted. The carboxylate group is attached via bidentate or bridging coordination to the TiO{sub 2} surface and enables photoinduced charge transfer between TiO{sub 2} and P3HT. The observed large quenching (with excitation at 488 nm) and enhanced emission (with excitation at 325 nm) indicates that efficient Foerster resonance energy transfer occurs between TiO{sub 2} and P3HT. Thus, the main influences on the high efficiency of the hybrid PV cells are the photon-mediated electronic transition and the photoinduced charge transfer.

• OSTI ID: 21476434
• Journal Information: Journal of Applied Physics, Vol. 108, Issue 4; Other Information: DOI: 10.1063/1.3459889; (c) 2010 American Institute of Physics; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALIGNMENT
ANNEALING
CHARGE EXCHANGE
DOPED MATERIALS
ENERGY TRANSFER
EXCITATION
INDIUM OXIDES
PHOTONS
PHOTOVOLTAIC EFFECT
QUENCHING
SEMICONDUCTOR MATERIALS
SOLAR CELLS
SUBSTRATES
TITANIUM OXIDES
BOSONS
CHALCOGENIDES
DIRECT ENERGY CONVERTERS
ELEMENTARY PARTICLES
ENERGY-LEVEL TRANSITIONS
EQUIPMENT
HEAT TREATMENTS
INDIUM COMPOUNDS
MASSLESS PARTICLES
MATERIALS
OXIDES
OXYGEN COMPOUNDS
PHOTOELECTRIC CELLS
PHOTOELECTRIC EFFECT
PHOTOVOLTAIC CELLS
SOLAR EQUIPMENT
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS