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P-N junction

P-N junction

A p-n junction is formed when p-type and n-type semiconductor materials are joined together. At the interface of the p-n junction, holes from the p-side and electrons from the n-side begin to diffuse into the opposite sides due to the concentration gradient. This diffusion of carriers leads to a region around the junction where there are no free charge carriers, known as the depletion region. The charge density within the depletion region for the n-side and p-side can be described by the...

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Updated: Jun 14, 2025

Flash Infrared Annealing for Perovskite Solar Cell Processing

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Published on: February 3, 2021

The Promise and Challenges of Inverted Perovskite Solar Cells.

Peng Chen¹, Yun Xiao^1,2, Shunde Li¹

¹State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, School of Physics, Frontiers Science Center for Nano-optoelectronics & Collaborative Innovation Center of Quantum Matter, Peking University, Beijing 100871, China.

Chemical Reviews

|August 29, 2024

Summary

Inverted perovskite solar cells (PSCs) offer high efficiency and stability for next-generation solar technology. This review covers fabrication methods, tandem applications, and challenges for commercializing these promising photovoltaic devices.

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Area of Science:

Materials Science
Renewable Energy
Photovoltaics

Background:

Inverted perovskite solar cells (PSCs) with p-i-n architecture are gaining attention for their stability, efficiency, and low-cost processing.
These cells are compatible with tandem architectures, driving significant research and development.
Certified power conversion efficiencies (PCEs) for single-junction and perovskite-silicon tandem solar cells (TSCs) have reached 26.15% and 33.9%, respectively.

Purpose of the Study:

To review key methods for fabricating high-efficiency and stable inverted PSCs.
To explore the underlying reasons for the exceptional stability of inverted PSCs.
To summarize recent advancements in inverted TSCs, including perovskite-Si, all-perovskite, and perovskite-organic configurations.

Main Methods:

Composition, additive, solvent, and processing engineering for PSC fabrication.
Development of novel charge transporting layers and interface engineering.
Review of tandem solar cell architectures and stability mechanisms.

Main Results:

Various engineering strategies have been successfully employed to enhance the efficiency and stability of inverted PSCs.
Inverted PSCs exhibit remarkable stability, a critical factor for commercial viability.
Significant progress has been made in developing diverse inverted TSCs, demonstrating high performance.

Conclusions:

Inverted PSCs and TSCs show immense potential for commercial solar energy applications.
Further research is needed on scaling up, indoor light harvesting, economic feasibility, and environmental impact reduction.
Addressing these challenges will pave the way for the widespread adoption of inverted PSC technology.