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An Absorption-Transport Reconfigurable 2D/3D/2D Architecture Enables Multispectral-Adaptive Bifacial Perovskite
Siyang Zhang1, Haoxuan Sun1, Min Wang1
1School of Physical Science and Technology, Jiangsu Key Laboratory of Frontier Material Physics and Devices, Suzhou Key Laboratory of Intelligent Photoelectric Perception, Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Center for Energy Conversion Materials and Physics (CECMP), Soochow University, Suzhou, P. R. China.
A novel reconfigurable solar cell architecture uses a 2D perovskite layer to separate light wavelengths, boosting efficiency under various lighting conditions. This bifacial device achieves high power conversion efficiencies and exceptional voltage, demonstrating long-term stability for versatile applications.
Area of Science:
- Materials Science
- Renewable Energy
- Photovoltaics
Background:
- Tandem architectures are standard for optimizing photovoltaic devices but often require complex multi-terminal designs.
- Existing designs face challenges in adapting to diverse light sources like sunlight and artificial lighting.
- A trade-off exists between broadband photon absorption and efficient photon-energy utilization in conventional solar cells.
Purpose of the Study:
- To introduce a reconfigurable architecture for bifacial single-junction solar cells.
- To achieve spectral absorption separation using parasitic absorption in a 2D perovskite layer.
- To enable efficient photon-energy harvesting under diverse light conditions, including sunlight and artificial light.
Main Methods:
- Implementation of an absorption-transport reconfigurable architecture in a bifacial single-junction device.
- Utilizing the parasitic absorption of a 2D perovskite passivation layer for spectral separation.
- Characterization of device performance under standard (AM 1.5G) and various artificial light sources (LED, fluorescent).
Main Results:
- The device achieved a power conversion efficiency (PCE) of 24.69% under AM 1.5G.
- Exceptional PCEs of 38.45% (warm-white LED) and 37.55% (TL84 fluorescent) were recorded.
- A record open-circuit voltage (Voc) of 1.081 V under weak illumination (1122 lux) and 1.67 V under blue light were achieved.
- The device demonstrated excellent stability, retaining over 90% performance after 2000 hours of operation.
Conclusions:
- The developed architecture effectively separates light wavelengths, enhancing energy conversion across different spectra.
- The bifacial design allows for near-omnidirectional light harvesting and broad applicability.
- This technology offers a viable pathway for rapid, scenario-agnostic deployment of efficient solar energy solutions.
