Single CuTCNQ charge transfer complex nanowire as ultra high responsivity photo-detector | Zendy

Rabaya Basori | Zendy; Kaustuv Das | Zendy; Prashant Kumar | Zendy; K. Narayan | Zendy; A. K. Raychaudhuri | Zendy

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Single CuTCNQ charge transfer complex nanowire as ultra high responsivity photo-detector

Author(s) -

Rabaya Basori,

Kaustuv Das,

Prashant Kumar,

K. Narayan,

A. K. Raychaudhuri

Publication year - 2014

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.22.004944

Subject(s) - responsivity , nanowire , materials science , optoelectronics , dark current , optics , photodetector , absorption (acoustics) , detector , biasing , charge (physics) , voltage , physics , composite material , quantum mechanics

We report ultra large photo responsivity ℜ (ratio of photo-generated current to absorbed power) in a single nanowire (NW) device made from a single strand of a nanowire (diameter ~30nm and length ~200nm) of an organomettalic semiconducting charge transfer complex material of CuTCNQ. The device shows responsivity of 8x10(4) A/Watt at 1 volt applied bias with an enhancement over the dark current exceeding 10(5) at zero bias. The observed photo current has a spectral dependence that strongly follows the main absorption peak (close to 405 nm) showing the primary role of absorbed photo-generated carriers.

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