In:
Modern Physics Letters B, World Scientific Pub Co Pte Ltd, Vol. 37, No. 28 ( 2023-10-10)
Abstract:
The photovoltaic performances of n-i-p or inverted p-i-n BaSi 2 homojunction solar cells are limited by the parasitic high light absorption of n-BaSi 2 or p-BaSi 2 window layer. In this work, diverse electron transport materials (ETMs) and hole transport materials (HTMs) are employed instead of BaSi 2 as window layers to promote the performances of BaSi 2 solar cells, and the effects of different ETMs and HTMs were simulated and comprehensively studied. For n-ETM/i-BaSi 2 /p-BaSi 2 solar cells, the solar cell with ZnO exhibits the highest efficiency of 28.21%. As increasing the thicknesses of ETM layer from 5[Formula: see text]nm to 100[Formula: see text] nm, the efficiency for n-BaSi 2 /i-BaSi 2 /p-BaSi 2 solar cell decreases seriously from 24.52% to 15.99%, while the solar cells with wide band gap ETMs including SnO 2 , TiO 2 and ZnO show neglectable change in performances. The performances n-ETM/i-BaSi 2 /p-BaSi 2 solar cells are affected by donor like defects more than acceptor like defects in i-BaSi 2 . For p-HTM/i-BaSi 2 /n-BaSi 2 solar cells, employing Cu 2 O, CuI, CuSCN or NiO as HTM layer produces evident valence band discrepancies at HTM/i-BaSi 2 interfaces. Heavy doping in HTM layer is necessary desired to overcome the energy band barriers. As increasing the thicknesses of HTM layer from 5 nm to 100 nm, the efficiency for p-BaSi 2 /i-BaSi 2 /n-BaSi 2 solar cell also decreases from 24.52% to 15.99%, while the solar cells with wide band gap HTMs including CuI, CuSCN and NiO show neglectable change, and the efficiency for p-Cu 2 O/i-BaSi 2 /n-BaSi 2 solar cells decreases slightly from 25.86% to 24.88%. The performances of p-HTM/i-BaSi 2 /n-BaSi 2 solar cells are affected by acceptor like defects more than donor like defects in i-BaSi 2 .
Type of Medium:
Online Resource
ISSN:
0217-9849
,
1793-6640
DOI:
10.1142/S0217984923501208
Language:
English
Publisher:
World Scientific Pub Co Pte Ltd
Publication Date:
2023
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