Synergetic ferroelectric luminescence from self-assembled tetraphenylethene aggregates

Donghwan Kim; Hoang Tran Thi Thuy; Byeonggwan Kim; Eunkyoung Kim

doi:10.1117/12.2647787

14 March 2023 Synergetic ferroelectric luminescence from self-assembled tetraphenylethene aggregates

Donghwan Kim, Hoang Tran Thi Thuy, Byeonggwan Kim, Eunkyoung Kim

Proceedings Volume 12418, Organic Photonic Materials and Devices XXV; 1241802 (2023) https://doi.org/10.1117/12.2647787
Event: SPIE OPTO, 2023, San Francisco, California, United States

Abstract

Synergetic ferroelectric luminescent (SFL) materials comprising a central tetraphenylethene (TP) core were synthesized by attaching TP with clipping groups (C), where clipping groups consist of a self-assembling group (SAG). TPCns selfassembled by the intermolecular interaction of SAGs to induce TP aggregation, as evidenced by the clip-induced quenching of emission at SAGs (E_clip) accompanied by aggregation-induced emission enhancement of TPs (E_AIE). TPC4 showed strong photoluminescence in a dilute chloroform solution and large E_AIE in aqueous (<50%) THF solution. TPCn film showed SFL properties with high quantum yield of photoluminescence (<80%) and ferroelectric switching. TPC4 was successfully employed in light emitting electrochemical cells (LECs) to achieve high luminance above 1290 cd m−2 under pulsed current conditions. TPC4 had a higher remnant polarization (Pr = 2.27 μC cm⁻²) at room temperature than TPC1. The thin film of TPCn was stable even with repeated bending due to the flexible SAG with long alkyl chains. Therefore, the SFL of TPCn was effectively employed in a piezoelectric nanogenerator, which produced piezoelectric output voltage of up to 0.13 V and a current density of 1.14 nA cm⁻² under repeated concave bending. These results indicate that side chain clipping and central TP aggregation resulted in unprecedented flexible SFL properties in a single compound, which simultaneously enhanced electroluminescence, mechanical sensitivity and energy harvesting ability.

Conference Presentation

Citation Download Citation

Donghwan Kim, Hoang Tran Thi Thuy, Byeonggwan Kim, and Eunkyoung Kim "Synergetic ferroelectric luminescence from self-assembled tetraphenylethene aggregates", Proc. SPIE 12418, Organic Photonic Materials and Devices XXV, 1241802 (14 March 2023); https://doi.org/10.1117/12.2647787

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available