n-Channel Polymer Field-Effect Transistors without Encapsulation Have over 21-Year Stability in Ambient Air

IF 8.7 1区化学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Materials Letters Pub Date : 2025-07-25 DOI:10.1021/acsmaterialslett.5c00785

Duyen K. Tran, Felix Sunjoo Kim and Samson A. Jenekhe*,

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Abstract

We report herein the ultrahigh stability of n-channel organic field-effect transistors (OFETs) based on ladder poly(benzimidazobenzophenanthroline) (BBL), without any encapsulation, which have remained fully functional after over 21 years of storage in ambient air, marking an unprecedented milestone for organic electronic devices. Although the BBL OFETs, fabricated in 2003 and 2011, had excellent functionality, the figures of merit slightly degraded from their original values. Thermal annealing of the aged OFETs enabled a complete reversal of the degradation process and full recovery of the electron transport properties. Trap density of states spectral analysis and characterization of OFET performance as a function of thermal annealing show that the ambient air-induced trapping sites accumulated at the semiconductor/dielectric interface over the long term are fully passivated. Our results provide evidence of over 21-year ambient air stability of BBL OFETs and offer insights into the potential design of next-generation semiconducting polymers and organic electronic devices with excellent stability.

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无封装的n沟道聚合物场效应晶体管在环境空气中具有超过21年的稳定性

我们在此报道了基于梯形聚苯并咪唑苯并菲罗啉（BBL）的超高稳定性n通道有机场效应晶体管（ofet），无需任何封装，在环境空气中储存超过21年后仍能保持完全功能，这标志着有机电子器件的一个前所未有的里程碑。虽然在2003年和2011年制造的BBL ofet具有出色的功能，但其性能值与原始值相比略有下降。老化ofet的热退火使降解过程完全逆转，电子输运性质完全恢复。阱态密度光谱分析和表征OFET性能作为热退火的函数表明，长期积累在半导体/介电界面的环境空气诱导阱位被完全钝化。我们的研究结果为BBL ofet超过21年的环境空气稳定性提供了证据，并为下一代半导体聚合物和具有优异稳定性的有机电子器件的潜在设计提供了见解。

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来源期刊

ACS Materials Letters MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

14.60

自引率

3.50%

发文量

261

期刊介绍： ACS Materials Letters is a journal that publishes high-quality and urgent papers at the forefront of fundamental and applied research in the field of materials science. It aims to bridge the gap between materials and other disciplines such as chemistry, engineering, and biology. The journal encourages multidisciplinary and innovative research that addresses global challenges. Papers submitted to ACS Materials Letters should clearly demonstrate the need for rapid disclosure of key results. The journal is interested in various areas including the design, synthesis, characterization, and evaluation of emerging materials, understanding the relationships between structure, property, and performance, as well as developing materials for applications in energy, environment, biomedical, electronics, and catalysis. The journal has a 2-year impact factor of 11.4 and is dedicated to publishing transformative materials research with fast processing times. The editors and staff of ACS Materials Letters actively participate in major scientific conferences and engage closely with readers and authors. The journal also maintains an active presence on social media to provide authors with greater visibility.