Solution Processable 1D Fullerene C60 Crystals for Visible Spectrum Photodetectors

Solution Processable 1D Fullerene C60 Crystals for Visible Spectrum Photodetectors Visible spectrum photodetector devices fabricated using molecular crystals of carbon C60 are reported. The devices operate efficiently, extending over and beyond the full visible light spectrum (300–710 nm) with a bias voltage tunable responsivity of 4 mA–0.5 mA W−1. Across this range of wavelengths, the noise equivalent power of these devices remains below 102 nW Hz−1/2, providing a detectivity of 107 Jones. The noise current in these devices is found to have a strong dependence on both bias voltage and frequency, varying by 4 orders of magnitude from 1 nA Hz−1/2 to 0.1 pA Hz−1/2. The devices also display a near‐linear dependence of photocurrent on light intensity over 4 orders of magnitude, providing a dynamic range approaching 80 dB. The 3 dB bandwidth of the devices is found to be above 102 Hz, while the 18 dB bandwidth exceeds 1 kHz. The transient photocurrents of the devices have a rise time of ≈50 µs and a long fall time of ≈4 ms. The spectral photocurrent of the devices is found to quench gradually with a reduction in temperature from ≈300 K and is fully quenched at temperatures below T ≈ 100 K. Upon reheating, the device performance is fully recovered. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Small Wiley

Solution Processable 1D Fullerene C60 Crystals for Visible Spectrum Photodetectors

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Publisher
Wiley Subscription Services, Inc., A Wiley Company
Copyright
© 2018 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim
ISSN
1613-6810
eISSN
1613-6829
D.O.I.
10.1002/smll.201703624
Publisher site
See Article on Publisher Site

Abstract

Visible spectrum photodetector devices fabricated using molecular crystals of carbon C60 are reported. The devices operate efficiently, extending over and beyond the full visible light spectrum (300–710 nm) with a bias voltage tunable responsivity of 4 mA–0.5 mA W−1. Across this range of wavelengths, the noise equivalent power of these devices remains below 102 nW Hz−1/2, providing a detectivity of 107 Jones. The noise current in these devices is found to have a strong dependence on both bias voltage and frequency, varying by 4 orders of magnitude from 1 nA Hz−1/2 to 0.1 pA Hz−1/2. The devices also display a near‐linear dependence of photocurrent on light intensity over 4 orders of magnitude, providing a dynamic range approaching 80 dB. The 3 dB bandwidth of the devices is found to be above 102 Hz, while the 18 dB bandwidth exceeds 1 kHz. The transient photocurrents of the devices have a rise time of ≈50 µs and a long fall time of ≈4 ms. The spectral photocurrent of the devices is found to quench gradually with a reduction in temperature from ≈300 K and is fully quenched at temperatures below T ≈ 100 K. Upon reheating, the device performance is fully recovered.

Journal

SmallWiley

Published: Jan 1, 2018

Keywords: ; ; ; ;

References

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