Organic electrochemical transistors (OECTs) have been increasingly explored for innovative electronic devices. However, they inherently demand two power suppliers, which is unfavorable for the utilization of portable and wearable systems with strict energy requirements. Herein, by assembling a monocrystalline silicon solar cell into the OECT circuit with light as fuel, we demonstrated the possibility of a self-powered and light-modulated operation of organic photoelectrochemical transistor (OPECT) optoelectronics. Exemplified by poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS)-based depletion-mode and accumulation-mode OECTs, different light-addressable configurations were constructed, and the corresponding characteristics were systematically studied and compared. Different device behaviors with distinct characteristics could be achieved with the appropriate usage of light stimulation. Toward applications, optologics were designed with various parameters depending on the incident irradiance. Light-controlled OPECT unipolar inverters were further demonstrated and optimized with respect to the power source and resistance. This work features new OPECT optoelectronics combined with proper flexible substrates and solar cells for potential applications in portable and wearable devices.
Electronic supplementary material: Supplementary material is available in the online version of this article at 10.1007/s40843-022-2295-8.
越来越多的研究将有机电化学晶体管(OECT)用于新颖的电学设备, 然而这些设备天然需要两个仪器电源, 不利于将其应用于对能源供应有严格要求的便携和可穿戴体系. 本文通过将单晶硅太阳能电池组装到OECT的回路中并以光作为燃料, 构建了自供能和光调控功能的有机光电化学晶体管(OPECT)光电子器件. 以基于聚(3,4-乙烯二氧噻吩)-聚(苯乙烯磺酸酯) (PEDOT:PSS)的耗尽型和增强型OECT为例, 我们设计了不同的光寻址结构并系统地研究和比较了相应的特性. 通过合适的光调制, 我们实现了不同的器件行为, 且这些器件表现出优异的性能. 在应用层面, 我们设计了光逻辑电路, 其不同的特性可以通过相应的辐照度来调控; 此外, 我们展示了光控的OECT单极逆变器, 并根据系统的能源供应和阻抗进行了优化. 本工作代表着新型的OPECT光电子器件, 合理地将其与柔性基底和太阳能电池组装有望应用于便携和可穿戴器件领域.
Keywords: light-addressable logic gate; light-controlled inverter; optoelectronics; organic photoelectrochemical transistor; silicon solar cell.
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