Dual Fluorescence Enhanced Photorecovery Behavior of OFET Memories Based on Carbazole-Based Polymer Electrets
Linyi Bian , Yue Zhang , Zhaocheng Xu , Jincheng Zhu , Wang Peng , Jun Chen , Shuaiqi Zhou , Qiushuo Han , Xinyang Zhou , Guangwei Zhang , Haifeng Ling , Linghai Xie
Chinese Journal of Chemistry ›› 2026, Vol. 44 ›› Issue (13) : 2057 -2066.
Recent advances in photoresponsive OFET memories have demonstrated the significant benefits of incorporating optical bias as a fourth terminal control. Herein, three novel carbazole-based polymers are designed and synthesized via Friedel-Crafts polymerization. The polymers serve as photoresponsive electrets, where carbazole moieties act as charge-trapping sites and photoactive units. The penta-cene-based OFET memory device incorporating solution-processed PAnCz exhibits a large memory window (54.4 V), fast programming speed (<20 ms), high hole-trapping density (4.61 × 1012 cm–2) and reliable charge retention. PAnCz and PDPhCz devices demonstrate significantly improved photorecovery efficiency compared to that of PDFlCz. The superior performance is attributed to their dual fluo-rescence emission under 350 nm (0.6 mW/cm2) light illumination. The dual fluorescence phenomenon facilitates efficient generation, separation and recombination of photocarriers, which consequently improves the photomodulation efficiency of the devices. This study suggests that dual-fluorescent polycarbazole electrets represent a promising materials platform for photoresponsive OFET memory.
Organic field-effect transistor memory / Charge trapping / Carbazole-based polymers / Charge transfer / Photorecovery behavior / Charge carrier injection / Memory window / Light illumination
2026 SIOC, CAS, Shanghai, & WILEY-VCH GmbH
/
| 〈 |
|
〉 |
PDF
