TY - JOUR

T1 - Highly bendable luminescent semiconducting organic single crystal

AU - Kazantsev, Maxim S.

AU - Konstantinov, Vladislav G.

AU - Dominskiy, Dmitry I.

AU - Bruevich, Vladimir V.

AU - Postnikov, Valery A.

AU - Luponosov, Yuriy N.

AU - Tafeenko, Victor A.

AU - Surin, Nikolay M.

AU - Ponomarenko, Sergey A.

AU - Paraschuk, Dmitry Yu

PY - 2017/10/1

Y1 - 2017/10/1

N2 - Mechanical flexibility is one of the key benefits of organic electronics and optoelectronics. Although organic single crystals show the best performance in field-effect and light-emitting transistors, they are commonly considered to be brittle. In this work, we show that organic single crystals can be flexible, luminescent and semiconducting. We grew ∼1 cm-size single crystals of a thiophene/phenylene co-oligomer, 1,4-bis(5′-hexyl-2,2′-bithiene-5-yl)benzene, from solution and resolved their structure by x-ray analysis. The crystals were bendable with a radius down to 0.2 mm corresponding to a mechanical strain of 5%, had molecularly flat surface, showed the photoluminescence quantum yield up to 17% and charge mobility up to 0.07 cm2/Vs. Multiple bending cycles of the crystals did not affect their photoluminescence but resulted in minor degradation of the charge mobility. These findings indicate that organic single crystals can be a platform for flexible optoelectronic devices.

AB - Mechanical flexibility is one of the key benefits of organic electronics and optoelectronics. Although organic single crystals show the best performance in field-effect and light-emitting transistors, they are commonly considered to be brittle. In this work, we show that organic single crystals can be flexible, luminescent and semiconducting. We grew ∼1 cm-size single crystals of a thiophene/phenylene co-oligomer, 1,4-bis(5′-hexyl-2,2′-bithiene-5-yl)benzene, from solution and resolved their structure by x-ray analysis. The crystals were bendable with a radius down to 0.2 mm corresponding to a mechanical strain of 5%, had molecularly flat surface, showed the photoluminescence quantum yield up to 17% and charge mobility up to 0.07 cm2/Vs. Multiple bending cycles of the crystals did not affect their photoluminescence but resulted in minor degradation of the charge mobility. These findings indicate that organic single crystals can be a platform for flexible optoelectronic devices.

KW - Mechanical flexibility

KW - Organic field-effect transistor

KW - Photoluminescence

KW - Single crystals

KW - Thiophene/phenylene co-oligomer

KW - LASERS

KW - STABILITY

KW - THIOPHENE/PHENYLENE CO-OLIGOMERS

KW - THIN-FILM TRANSISTORS

KW - FIELD-EFFECT TRANSISTORS

UR - http://www.scopus.com/inward/record.url?scp=85026891990&partnerID=8YFLogxK

U2 - 10.1016/j.synthmet.2017.07.019

DO - 10.1016/j.synthmet.2017.07.019

M3 - Article

AN - SCOPUS:85026891990

VL - 232

SP - 60

EP - 65

JO - Synthetic Metals

JF - Synthetic Metals

SN - 0379-6779

ER -