Based on Ultrathin PEDOT:PSS/c-Ge Solar Cells Design and Their Photoelectric Performance

Abstract

In recent years, nanostructures have improved the performance of solar cells and are regarded as the most promising microstructures. The optical properties of PEDOT:PSS/c-Ge hybrid solar cells (HSCs) based on the octagon germanium nanoparticles (O-GNPs) were numerically analyzed using the finite-difference time-domain (FDTD) method. The optimal structure of the hybrid solar cell is determined by changing the thickness of the organic layer and structural parameters of nanoparticles to enhance the optical absorption and eventually achieve high broadband absorption. By changing the structure parameter of O-GNPs, we studied its effect on solar cells. The optimization of geometric parameters is based on maximum absorption. The light absorption of our optimized HSCs is basically above 90% between 200 and 1500 nm. PEDOT:PSS is placed on top of O-GNPs to transmit the holes better, allowing O-GNPs to capture a lot of photons, to increase absorbance value properties in the AM1.5 solar spectral irradiated region. The transmittance is increased by adding poly-methyl methacrylate (PMMA). At the same time, the electrical characteristics of Ge solar cells were simulated by DEVICE, and short-circuit current (Jsc), open-circuit voltage (Voc), maximum power (Pmax), filling coefficient (FF) and photoelectric conversion efficiency (PCE) were obtained. According to the optimization results after adjusting the structural parameters, the maximum short-circuit current is 44.32 mA/cm2; PCE is 7.84 mW/cm2; FF is 69%. The results show that the O-GNPs have a good light trapping effect, and the structure design has great potential for the absorption of HSCs; it is believed that the conversion efficiency will be further improved through further research.

An Asymmetric Silicon Grating Dual-Narrow-Band Perfect Absorber Based on Dielectric-Metal-Dielectric Structure

“…It can be clearly found that the extinction intensity of the two peaks decreases with the increase of the polarization angle. At the same time, we also noticed that when the incident plane wave is TE polarization, two new resonance peaks appear, which are caused by phase resonance (Qin et al, 2020;Su et al, 2021). The electric field generated at this time has a phase difference of π, which causes the far field to produce coherent cancellation, thereby generating two new peaks.…”

Preparation of ZnO/Bi2O3 Composites as Heterogeneous Thin Film Materials with High Photoelectric Performance on FTO Base

“…The efficient application of clean energy is the focus of current research. Among them, the application of solar energy is particularly critical [1][2][3]. As a clean energy, solar energy is widely used in many fields, such as photocatalysis, solar cells and so on [4][5][6].…”

Design of Grating Type GaAs Solar Absorber and Investigation of Its Photoelectric Characteristics

“…The research on broadband absorber has been carried out for many years in the world, and it has been used in solar cells, solar heating devices and photothermal converters (Liu et al, 2017;Keshavarz and Vafapour, 2019;Yu et al, 2020;Chen et al, 2021c;Su et al, 2021). For the design and improvement of broadband absorber, we should pay attention to the following aspects: the first is to select the appropriate material.…”