Dark-current measurements in a conjugated-polymer single crystal

Abstract Super long perovskite microwires (PMWs) are in a great demand in many fields such as low-loss microcables and integrated optical waveguide. Despite decades of research into PMWs, single crystal PMWs with several centimeters long have not been obtained. Here, ultralong (up to 7.6 centimeters) monoclinic crystal structure CH3NH3PbI3·DMF PMWs have been synthesized. The high-quality microwire exhibits long carrier lifetime of 1775.7 ns. The as-prepared free-standing PMWs can be integrated to any arbitrary substrate and 808 nm near-infrared photodetectors have been successfully demonstrated. The fabricated device shows a high light on/off ratio of 1.79×106 and an extremely low dark current of 2.5 fA at 1 V bias. This work provides a strategy for the solution growth of ultralong microwires.

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Emission of a Single Conjugated Polymer Chain Isolated in Its Single Crystal Monomer Matrix

Physical Review Letters ◽

10.1103/physrevlett.87.087401 ◽

2001 ◽

Vol 87 (8) ◽

Cited By ~ 39

Author(s):

T. Guillet ◽

J. Berréhar ◽

R. Grousson ◽

J. Kovensky ◽

C. Lapersonne-Meyer ◽

...

Keyword(s):

Single Crystal ◽

Polymer Chain ◽

Conjugated Polymer

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Transient Photoconductivity in Polyacetylene and Polydiacetylene

MRS Proceedings ◽

10.1557/proc-109-195 ◽

1987 ◽

Vol 109 ◽

Author(s):

D. Moses ◽

S. Phillips ◽

M. Sinclair ◽

A. J. Heeger

Keyword(s):

Quantum Yield ◽

Conducting Polymers ◽

Single Crystal ◽

Conjugated Polymer ◽

Crystal Form ◽

Transport Mechanisms ◽

Polymeric Systems ◽

Transient Photoconductivity ◽

Time Regime ◽

In Trans

ABSTRACTConducting polymers have been found to be rather good photoconductors in the sub-nansecond time regime. The TP measurement is an effective probe for determining carrier photogeneration quantum yield as well as for investigating transport mechanisms. Here, we present a short survey of our results for a few interesting polymeric systems. We start with the trans-(CH)x grown by the Shirakawa method. We then compared the TP results to those obtained from PDA-TS which currently is the only conjugated polymer in single crystal form. From this comparison, we are able to gauge the improvements in the material quality as was demonstrated by recent TP in trans-(CH)x grown by the Naarmann method

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Side-chain engineering of conjugated polymers toward highly efficient near-infrared organic photo-detectors via morphology and dark current management

Journal of Materials Chemistry C ◽

10.1039/d0tc00082e ◽

2020 ◽

Vol 8 (23) ◽

pp. 7765-7771

Author(s):

Yeongkwon Kang ◽

Hyeong Ju Eun ◽

Hyojin Kye ◽

Dahee Kim ◽

Junseok Heo ◽

...

Keyword(s):

Conjugated Polymers ◽

Dark Current ◽

Conjugated Polymer ◽

Near Infrared ◽

Side Chain ◽

Current Management ◽

Highly Efficient ◽

Photo Detectors

A side-chain engineered conjugated polymer provides outstanding NIR detectivity exceeding 2.0 × 1012Jones, due to enhanced photo-responsivity and suppressed dark current.

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