Surface Defect Passivation and Energy Level Alignment Engineering with a Fluorine-Substituted Hole Transport Material for Efficient Perovskite Solar Cells

2021 ◽  
Vol 13 (11) ◽  
pp. 13470-13477
Author(s):  
Li Tao ◽  
Biyi Wang ◽  
Haoxin Wang ◽  
Cheng Chen ◽  
Xingdong Ding ◽  
...  
Keyword(s):  
Solar Cells ◽  
Energy Level ◽  
Surface Defect ◽  
Perovskite Solar Cells ◽  
Hole Transport ◽  
Defect Passivation ◽  
Energy Level Alignment

Spiro-OMeTAD or CuSCN as a preferable hole transport material for carbon-based planar perovskite solar cells

2020 ◽  
Vol 8 (25) ◽  
pp. 12723-12734 ◽  
Author(s):  
Yang Yang ◽  
Minh Tam Hoang ◽  
Disheng Yao ◽  
Ngoc Duy Pham ◽  
Vincent Tiing Tiong ◽  
...  
Keyword(s):  
Solar Cells ◽  
Energy Level ◽  
Perovskite Solar Cells ◽  
Hole Transport ◽  
Device Performance ◽  
Carbon Electrode ◽  
Energy Level Alignment ◽  
Carbon Based

Carbon electrode-based planar PSCs demonstrated higher device performance and reduced hysteresis using a CuSCN based HTL owing to its favourable energy level alignment with the perovskite compared to conventional spiro-OMeTAD based HTL.

Interface Energy‐Level Management toward Efficient Tin Perovskite Solar Cells with Hole‐Transport‐Layer‐Free Structure

2021 ◽  
pp. 2106560
Author(s):  
Xiao Liu ◽  
Tianhao Wu ◽  
Caiyi Zhang ◽  
Yiqiang Zhang ◽  
Hiroshi Segawa ◽  
...  
Keyword(s):  
Solar Cells ◽  
Energy Level ◽  
Perovskite Solar Cells ◽  
Interface Energy ◽  
Hole Transport ◽  
Transport Layer ◽  
Hole Transport Layer

scholarly journals Energy Level Engineering of Charge Selective Contact and Halide Perovskite by Modulating Band Offset: Mechanistic Insights

2020 ◽  
Author(s):  
Yassine Raoui ◽  
Hamid Ez-Zahraouy ◽  
Samrana Kazim ◽  
Shahzada Ahmad
Keyword(s):  
Solar Cells ◽  
Energy Level ◽  
Conduction Band ◽  
Perovskite Solar Cells ◽  
Hole Transport ◽  
Conduction Band Minimum ◽  
Transport Layer ◽  
Hole Transport Layer ◽  
Band Offset ◽  
Interfacial Recombination

<p>Mixed cation and anion based perovskites solar cells (FAPbI<sub>3</sub>)<sub>0.85</sub>(MAPbBr<sub>3</sub>)<sub>0.15</sub> gave enhanced stability under outdoor conditions, however, it yielded limited power conversion efficiency when SnO<sub>2</sub> and Spiro-OMeTAD were employed as electron and hole transport layer (ETL/HTL). The inevitable interfacial recombination of charge carriers at ETL/perovskite and perovskite/HTL interface diminished the efficiency in planar (n-i-p) perovskite solar cells. Employing computational approach for uni-dimensional device simulator, the effect of band offset on charge recombination at both interfaces were investigated. We noted that it acquired cliff structure when the conduction band minimum of the ETL is lower than that of the perovskite, and thus maximizes interfacial recombination. However, if the conduction band minimum of ETL is higher than perovskite, i.e. spike structure is formed, which improve the performance of solar cell up to an optimum value of conduction band offset allowing to reach performance of 25.21%, with an open circuit voltage (<i>V</i><sub>oc</sub>) of 1231 mV, a current density <i>J</i><sub>sc</sub> of 24.57 mA/cm<sup>2</sup> and a fill factor of 83.28%. Additionally, we found that beyond the optimum offset value, large spike structure could decrease the performance. With an optimized, energy level of Spiro-OMeTAD and the thickness of mixed-perovskite layer performance of 26.56 % can be attained. Our results demonstrate a detailed understanding about the energy level tuning between the charge selective layers and perovskite and furthermore how the improvement in PV performance can be achieved by adjusting the energy level offset.</p>

Ammonium sulfate treatment at TiO2/perovskite interface boosts operational stability of perovskite solar cells

2021 ◽  
Author(s):  
Bening Tirta Muhammad ◽  
Teddy Salim ◽  
Annalisa Bruno ◽  
Andrew Clive Grimsdale ◽  
Wei Lin Leong
Keyword(s):  
Titanium Dioxide ◽  
Solar Cells ◽  
Electron Transport ◽  
Energy Level ◽  
Ammonium Sulfate ◽  
Perovskite Solar Cells ◽  
Operational Stability ◽  
Energy Level Alignment

Titanium dioxide (TiO2) electron transport layers (ETLs) are still widely used in perovskite solar cells (PSCs) due to their compatibility with existing printing technologies and favorable energy level alignment for...

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