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Efficient Bifacial Semitransparent Perovskite Solar Cells Using Ag/V2O5 as Transparent Anodes
Shangzheng Pang1, Xueyi Li1, Hang Dong1
1Wide Bandgap Semiconductor Technology Disciplines State Key Laboratory, School of Microelectronics , Xidian University , Xi'an 710071 , China.
ACS Applied Materials & Interfaces
|March 28, 2018
Summary
Cesium-doped perovskite solar cells (PSCs) with a silver/vanadium oxide electrode show improved bifacial performance. This Ag/V2O5 layer offers a low-cost, efficient solution for semitransparent and bifacial solar cells.
Area of Science:
- Materials Science
- Renewable Energy
- Solid-State Physics
Background:
- Perovskite solar cells (PSCs) are a promising photovoltaic technology.
- Bifacial and semitransparent designs enhance light harvesting and device versatility.
- Cesium incorporation in perovskite materials can improve stability and performance.
Purpose of the Study:
- To investigate the theoretical and experimental performance of bifacial semitransparent inverted planar PSCs.
- To evaluate the impact of a silver (Ag) thin film electrode and a vanadium pentoxide (V2O5) optical coupling layer.
- To explore the role of cesium (Cs) ions in enhancing device efficiency and stability.
Main Methods:
- Fabrication of inverted planar structured PSCs using Cs0.05FA0.3MA0.7PbI2.51Br0.54 perovskite.
- Utilized Ag thin film electrodes with and without a V2O5 optical coupling layer.
- Performed theoretical and experimental analysis of device performance under illumination from both sides (ITO and Ag).
- Investigated the effect of a back-reflector on power conversion efficiency (PCE).
Main Results:
- Introduction of Cs ions significantly improved device performance and stability.
- PSCs with bare Ag electrode achieved PCEs of 14.62% (ITO side) and 5.45% (Ag side).
- The Ag/V2O5 layer boosted PCE to 8.91% from the Ag side (63% improvement) with minimal change from the ITO side.
- A back-reflector further enhanced PCE to 15.39% (ITO) and 12.44% (Ag).
- Devices exhibited excellent semitransparent properties and negligible hysteresis.
Conclusions:
- The Ag/V2O5 double layer is a cost-effective and simple semitransparent electrode for PSCs.
- This electrode configuration offers a promising pathway for advancing bifacial PSCs and tandem solar cells.
- Cesium doping is crucial for optimizing the performance and stability of these advanced solar cell architectures.
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