A numerical investigation for performance enhancement of organic solar cell using Al-doped zinc oxide anode

The better efficient organic solar cell (OSC), without carrier transporting layer, has been investigated using the modified drift-diffusion phenomenon. The preceding choice of Al-doped zinc oxide (AZO) to be anode is beneficial for superior antireflection and transparency due to a combination of the specific absorbance wavelengths of < 380 nm and the attributes of greater mechanical versatility, low-cost fabrication, and reasonable effectiveness at a lower temperature. The study primarily focuses on obtaining an optimized thickness of P3 HT:PC 61 BM as an organic absorbing layer with AZO toward achieving a high open-circuit voltage (V_OC ) of 0.979 V, a short-circuit current density (J_SC) of 13.68 mA cm^-2, an outstanding fill factor (FF) about 83.4%, and an exceptional power conversion efficiency (g) of 11.18%, respectively. In addition, an inverse association concerning trap density (Nt) and temperature (T) in the AZO/P3 HT:PC61 BM/LiF/Al layout has been anticipated to enhance the g of OSC. The emphasized findings have been confirmed by exploring and enhancing aspects with impedance characteristics, capacitance-voltage (C-V) responses, and external quantum efficiency (EQE) characteristics. This achievement highlights the potential for the future development of a more efficient OSC. (author)