Hole transport mechanism in organic/inorganic hybrid system based on in-situ grown cadmium telluride nanocrystals in poly(3-hexylthiophene) | Zendy

Mohd Taukeer Khan | Zendy; Amarjeet Kaur | Zendy; S.K. Dhawan | Zendy; Suresh Chand | Zendy

Open Access

Hole transport mechanism in organic/inorganic hybrid system based on in-situ grown cadmium telluride nanocrystals in poly(3-hexylthiophene)

Author(s) -

Mohd Taukeer Khan,

Amarjeet Kaur,

S.K. Dhawan,

Suresh Chand

Publication year - 2011

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 - 10.1063/1.3594647

Subject(s) - cadmium telluride photovoltaics , nanocrystal , photoluminescence , materials science , quenching (fluorescence) , telluride , charge carrier , electron mobility , nanotechnology , optoelectronics , chemical physics , chemistry , physics , optics , metallurgy , fluorescence

The present manuscript demonstrates the hole transport mechanism in an organic/inorganic hybrid\udsystem based on in-situ grown cadmium telluride (CdTe) nanocrystals in a poly(3-hexylthiophene)\ud(P3HT) matrix. The increase of hole current in the hybrid system is correlated with the formation of\uda host-guest (P3HT-CdTe) charge transfer complex duly supported by photoluminescence\udquenching. The hole transport mechanism in P3HT is governed by a space charge limited current\udwith temperature, carrier density, and field dependent mobility. Incorporation of CdTe nanocrystals\udin a polymer matrix results in enhancement in the value of trap density Hb from 2.8 Â 1018 to\ud5.0 Â 1018 cmÀ3 and reduction in activation energies from 52 meV to 11 meV. At high trap density,\udtrap potential wells start overlapping; this results in decrease of activation energies.\u

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