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A BHJ-thin-film/liquid-electrolyte based electrochemical-sensor for visible light-detection

机译：基于BHJ薄膜/液态电解质的电化学传感器，可见光检测

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摘要

The current study presents a new type of inexpensive and very sensitive bulk heterojunction (BHJ) organic photo- sensor (OPS) configuration that incorporates a layer of liquid electrolyte into the conventional BHJ photodiode arrangement. Initially, a P3HT: PCBM blend based photo-anode was deposited onto ITO substrates using spin coating. Then the semiconductor coated photo-anode was attached to a Pt/ITO counter electrode. A 40 mm gap between photo-anode and counter electrode was filled with a liquid (iodine based) HI-30 electrolyte. Various electrical parameters including ideality factor, series and shunt resistance were extracted from the current-voltage characteristics under dark and light conditions. The value of mobility measured under dark conditions was found to be 25.58 x 10(-6) m(2) V-1 s(-1). In addition, the samples were found to have a series and shunt resistance of 133.33 Omega and 74.70 k Omega, respectively. Under illumination, the fabricated photodiodes exhibited a linear current-irradiance relationship, with a rapid response time, when exposed to transient light, thus making the newly proposed hybrid BHJ photo- diode configuration a potential alternative to the conventional photo-sensors.
机译：目前的研究提出了一种新型的廉价且非常敏感的散装异质结（BHJ）有机光传感器（OPS）配置，其包括一层液体电解质进入传统的BHJ光电二极管布置。最初，使用旋涂沉积P3HT：PCBM混合物的光阳极沉积在ITO基板上。然后将半导体涂覆的光阳极连接到Pt / ITO对电极。光阳极和对电极之间的40mm间隙填充有液体（基于碘的）Hi-30电解质。各种电气参数，包括理想因子，串联和分流电阻的各种电气参数从暗和光线条件下的电流 - 电压特性提取。发现在暗条件下测量的迁移量为25.58×10（-6）m（2）V-1 s（-1）。此外，发现样品分别具有133.33ω和74.70k欧米茄的串联和分流电阻。在照明下，制造的光电二极管在暴露于瞬态光线时具有快速响应时间的线性电流 - 辐照度关系，从而使新提出的混合BHJ光电二极管配置成为传统光传感器的电位替代。

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