Control of nanocrystal surface defects for efficient charge extraction in polymer-ZnO photovoltaic systems | Zendy

Seung-Jin Han | Zendy; A. A. D. T. Adikaari | Zendy; K. D. G. Imalka Jayawardena | Zendy; N. Aamiismy | Zendy; S. Ravi P. Silva | Zendy

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Control of nanocrystal surface defects for efficient charge extraction in polymer-ZnO photovoltaic systems

Author(s) -

Seung-Jin Han,

A. A. D. T. Adikaari,

K. D. G. Imalka Jayawardena,

N. Aamiismy,

S. Ravi P. Silva

Publication year - 2012

Publication title -

journal of applied physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.699

H-Index - 319

eISSN - 1089-7550

pISSN - 0021-8979

DOI - 10.1063/1.4751432

Subject(s) - materials science , crystallinity , photoluminescence , relative humidity , nanocrystal , nanostructure , polymer , photovoltaic system , chemical engineering , absorption (acoustics) , optoelectronics , nanotechnology , composite material , ecology , physics , biology , engineering , thermodynamics

Factors determining the photovoltaic device performance of blends of regioregular poly(3-hexylthiophene) (rr-P3HT) and ZnO nanostructures are reported. A decrease in the crystallinity of rr-P3HT upon the formation of ZnO (through hydrolysis) is observed through optical absorption spectroscopy. Increasing the humidity level for the ZnO formation leads to a decrease in the photoluminescence of the rr-P3HT:ZnO blend together with improved photovoltaic device performance. This is attributed to more efficient charge extraction due to a decrease in the radiative trap sites on the ZnO surface as a result of decreasing ZnO surface area with increasing humidity level. © 2012 American Institute of Physics

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