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Related Concept Videos

P-N junction01:11

P-N junction

590
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...
590

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Related Experiment Video

Updated: Jul 29, 2025

Close-Space Sublimation-Deposited Ultra-Thin CdSeTe/CdTe Solar Cells for Enhanced Short-Circuit Current Density and Photoluminescence
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Multifunctional Additive CdAc2 for Efficient Perovskite-Based Solar Cells.

Ningyu Ren1,2,3,4,5,6,7, Pengyang Wang1,2,3,4,5, Junke Jiang8,9

  • 1Institute of Photoelectronic Thin Film Devices and Technology, Renewable Energy Conversion and Storage Center, Solar Energy Research Center, Nankai University, Tianjin, 300350, P. R. China.

Advanced Materials (Deerfield Beach, Fla.)
|May 25, 2023
PubMed
Summary
This summary is machine-generated.

Adding Cadmium Acetate (CdAc2) to perovskite precursor solutions enhances flexible solar cell performance. This strategy improves crystal quality and carrier lifetime, achieving high power conversion efficiencies for perovskite solar cells and perovskite/silicon tandem solar cells.

Keywords:
CdAc2flexible perovskite solar cellsperovskite solar cellperovskite/silicon tandem solar cells

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Area of Science:

  • Materials Science
  • Renewable Energy
  • Photovoltaics

Background:

  • Flexible and textured perovskite solar cells often suffer from defects, limiting their performance.
  • Developing substrate-tolerant fabrication methods is crucial for advancing perovskite device technology.

Purpose of the Study:

  • To investigate the effect of Cadmium Acetate (CdAc2) on perovskite film quality and device performance.
  • To establish a facile fabrication strategy for high-efficiency flexible and tandem perovskite solar cells.

Main Methods:

  • Incorporation of a small amount of Cadmium Acetate (CdAc2) into the PbI2 precursor solution.
  • Fabrication of polycrystalline perovskite films on flexible substrates.
  • Characterization of film properties, carrier lifetimes, and device performance.
  • Testing of perovskite/silicon tandem solar cells (TSCs) under operational conditions.

Main Results:

  • CdAc2 addition led to nano-hole array films with improved organic salt diffusion and crystal orientation.
  • Achieved ultra-long carrier lifetimes exceeding 6 µs in perovskite films on flexible substrates.
  • Demonstrated a power conversion efficiency (PCE) of 22.78% for single-junction flexible perovskite solar cells (FPSCs).
  • Attained a champion PCE of 29.25% for perovskite/silicon tandem solar cells (TSCs) utilizing CdAc2.
  • Un-encapsulated TSCs retained over 109% efficiency after 300 hours of operation at 45°C.

Conclusions:

  • Cadmium Acetate is an effective additive for fabricating high-quality perovskite films on challenging substrates.
  • This strategy significantly enhances the performance and stability of both flexible single-junction and tandem perovskite solar cells.
  • The findings offer a promising pathway for the commercialization of efficient and durable perovskite-based photovoltaics.