Analysis of Hybrid Hetero-Homo Junction Lead-Free Perovskite Solar Cells by SCAPS Simulator

Abstract

In this work, we report on the effect of substituting the active intrinsic i-layer on a conventional pin structure of lead-free perovskite solar cell (PSC) by a homo p-n junction, keeping the thickness of the active layer constant. It is expected that when the active i-layer is substituted by a p-n homo junction, one can increase the collection efficiency of the photo-generated electrons and holes due to the built-in electric field of the homo junction. The impact of the technological and physical device parameters on the performance parameters of the solar cell have been worked out. It was found that p-side thickness must be wider than the n-side, while its acceptor concentration should be slightly lower than the donor concentration of the n-side to achieve maximum efficiency. In addition, different absorber types, namely, i-absorber, n-absorber and p-absorber, are compared to the proposed pn-absorber, showing a performance-boosting effect when using the latter. Moreover, the proposed structure is made without a hole transport layer (HTL) to avoid the organic issues of the HTL materials. The back metal work function, bulk trap density and ETL material are optimized for best performance of the HTL-free structure, giving Jsc = 26.48, Voc = 0.948 V, FF = 77.20 and PCE = 19.37% for AM1.5 solar spectra. Such results highlight the prospective of the proposed structure and emphasize the importance of using HTL-free solar cells without deteriorating the efficiency. The solar cell is investigated by using SCAPS simulator.

High-Efficiency Electron Transport Layer-Free Perovskite/GeTe Tandem Solar Cell: Numerical Simulation

“…Decreasing the recombination rate at the CH3NH3PbI3-xCIx/ETL interface is a good way to extract the carriers efficiently. To achieve this condition, the CBO of th CH3NH3PbI3-xCIx layer should be 0-0.3 eV lower than the corresponding band of the ETL The CBO is given by Equation (4) [41].…”

“…To achieve this condition, the CBO of the CH 3 NH 3 PbI 3−x CI x layer should be 0-0.3 eV lower than the corresponding band of the ETL. The CBO is given by Equation (4) [41]. CBO = (χ abs − χ ETL )…”

PERFORMANCE SIMULATION OF ECO-FRIENDLY SOLAR CELLS BASED ONCH3NH3SnI3

“…The analysis of the PCE and the other parameters of the simulated photovoltaic cells the previous studies demonstrated in combination with the results of this research allows to conclude that the model used in this research is reliable. Analyzing works [28][29][30][31], one can draw some conclusions regarding the change in the thickness of the absorber layer, in particular, with an increase in the thickness of the absorber, PCE PSC increases, and one can also notice a tendency towards a decrease in FF. This can be explained by the fact that in the case of an increase in the thickness of the absorbing layer, the Energy.…”

Optimization of Organic-Inorganic Perovskite Solar Cell Layers

“…The standard solar spectrum (AM1.5) was used with an incident power density (1000 mW/cm 2 ) at room temperature (300K) and the input parameters of SnO 2 taken from [14,15,20] publication. The perovskite and Spiro-OMeTAD parameters are taken from [2,4,8,18,19] and [4,17,21,[23][24][25][26], respectively. Each layer is given a neutral defect of Gaussian-distribution with energy characteristic of 0.1eVand examined the interface defects layers of (ETM/perovskite) and (perovskite/HTM).…”

“…Photovoltaic technology has advanced due to numerous solar device structures and its costeffectiveness and enhanced performance [1,2]. The perovskite absorber-based solar structure has become one of the most emerging PV technologies [3,4]. Perovskite materials exhibit good PV output characteristics due to their high absorption coe cient, adequate bandgap, and lengthy charge-carrier diffusion lengths.…”