Electrical and photoelectrical characteristic investigation of a new generation photodiode based on bromothymol blue dye

International Physics Conference at the Anatolian Peak 2016

Imer, A. Gencer^1 ; Tombak, A.^2 ; Korkut, A.^1

Department of Physics, Yuzuncu Yil University, Van

65080, Turkey^1

Department of Physics, Batman University, Batman, Turkey^2

关键词: Alternative current;    Capacitance voltage;    Current-voltage measurements;    Different frequency;    Electrical parameter;    Illumination intensity;    Organic thin films;    Photo-electrical properties;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/707/1/012012/pdf
DOI  :  10.1088/1742-6596/707/1/012012

来源: IOP

【 摘 要 】

Bromothymol blue (BTB) with the molecular formula of C27H28Br2O5S was grown onto p-Si substrate to fabricate heterojunction by spin coating technique. The current voltage (I-V) measurements of diode were carried out in dark and under different illumination intensity at room temperature. The photoelectrical properties of heterojunction based on BTB were investigated using the illumination intensity dependent I-V data. The results showed that photo current of diode increases with the increase in light intensity. Also, the electrical parameters of device were determined via I-V, and capacitance- voltage (C-V), conductance-voltage (G-V) measurements at different frequencies. It is observed that the excess capacitance is created at low frequencies due to the contribution of interface states charge which can follow the alternative current signal to capacitance. It is stated that, both the electricalphotoelectrical parameters of diode can be changed, and also the performance of the device could be affected by the organic thin film interlayer.