Boosting the Photoresponse of Transistor Memory through Triplet–Triplet Annihilation Upconversion Using Diphenylanthracene Copolymers

ACS Applied Optical Materials Pub Date : 2025-03-27 DOI:10.1021/acsaom.5c0000210.1021/acsaom.5c00002

Zi-Yue Huang, Yi-Hsun Weng, Yan-Cheng Lin* and Wen-Chang Chen*,

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引用次数: 0

Abstract

Delayed fluorescence presents considerable opportunities for improving the performance of optoelectronic devices; however, the utilization of triplet–triplet annihilation (TTA) upconversion in phototransistors has not been extensively investigated. This study addresses this gap by examining the impact of TTA on phototransistor memory using a blend of the upconversion copolymer poly(diphenylanthracene-co-methyl methacrylate) (PDPAMA) and platinum(II) octaethylporphyrin (PtOEP) as an electret. In this TTA process, PDPAMA acts as the emitter. At the same time, PtOEP serves as the sensitizer, efficiently absorbing longer-wavelength light and enabling the conversion of 530 nm green light into 440 nm blue delayed fluorescence. To harness this upconversion fluorescence, α-sexithiophene is employed as the semiconductor channel layer due to its broad absorption band, effectively capturing the emitted blue light. The presence and influence of the TTA process on photomemory devices are confirmed through comprehensive optical analyses. Devices incorporating PtOEP demonstrate superior memory effects under photoassisted electrical writing compared to those with only PDPAMA, highlighting the effectiveness of the TTA upconversion mechanism in boosting the device’s photoresponse. This research underscores the substantial potential of TTA upconversion for advancing phototransistor memory applications.

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二苯基镧共聚物三重态-三重态湮灭上转换提高晶体管存储器的光响应

延迟荧光为提高光电器件的性能提供了相当大的机会；然而，三重态-三重态湮灭（TTA）上转换在光电晶体管中的应用尚未得到广泛研究。本研究通过使用上转换共聚物聚（二苯基蒽-甲基丙烯酸甲酯共聚物）（PDPAMA）和八乙基卟啉铂（II）（PtOEP）的混合物作为驻极体，研究TTA对光电晶体管存储器的影响，从而解决了这一差距。在这个TTA过程中，PDPAMA充当发射器。同时，PtOEP作为敏化剂，有效地吸收较长波长的光，并能够将530 nm的绿光转换为440 nm的蓝色延迟荧光。为了利用这种上转换荧光，α-六噻吩因其宽吸收带而被用作半导体沟道层，有效地捕获了发射的蓝光。通过全面的光学分析，证实了TTA过程对光存储设备的存在和影响。与仅使用PDPAMA的器件相比，使用PtOEP的器件在光辅助电写入下表现出优异的记忆效应，突显了TTA上转换机制在增强器件光响应方面的有效性。这项研究强调了TTA上变频在推进光电晶体管存储器应用方面的巨大潜力。

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来源期刊

ACS Applied Optical Materials 材料科学-光学材料-

CiteScore

1.10

自引率

0.00%

发文量

期刊介绍： ACS Applied Optical Materials is an international and interdisciplinary forum to publish original experimental and theoretical including simulation and modeling research in optical materials complementing the ACS Applied Materials portfolio. With a focus on innovative applications ACS Applied Optical Materials also complements and expands the scope of existing ACS publications that focus on fundamental aspects of the interaction between light and matter in materials science including ACS Photonics Macromolecules Journal of Physical Chemistry C ACS Nano and Nano Letters.The scope of ACS Applied Optical Materials includes high quality research of an applied nature that integrates knowledge in materials science chemistry physics optical science and engineering.