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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: Sep 2, 2025

Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance

Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance

Published on: February 27, 2017

Robust, High-Performing Maize-Perovskite-Based Solar Cells with Improved Stability.

Antonella Giuri¹, Nicholas Rolston², Silvia Colella^2,3

¹CNR NANOTEC, Institute of Nanotechnology, Via Monteroni, Lecce 73100, Italy.

ACS Applied Energy Materials

|August 5, 2022

Summary

We enhanced perovskite solar cell (PSC) stability using a starch polymer additive. This approach improves thermomechanical and environmental durability while maintaining high photovoltaic performance for commercial viability.

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Last Updated: Sep 2, 2025

Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance

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Published on: October 3, 2018

Area of Science:

Materials Science
Renewable Energy
Photovoltaics

Background:

Perovskite solar cells (PSCs) face challenges in long-term chemical and thermomechanical stability, hindering commercialization.
Developing robust PSCs requires strategies to enhance material durability without compromising performance.

Purpose of the Study:

To improve the long-term chemical and thermomechanical stability of perovskite solar cells (PSCs).
To investigate the effects of incorporating a long-chain starch polymer into the perovskite precursor.

Main Methods:

A long-chain starch polymer was incorporated into the perovskite precursor solution.
The strategy involved templating perovskite growth for compact and homogeneous film formation.
Characterization of film properties, including fracture energy and optoelectronic performance.

Main Results:

Starch polymer addition resulted in compact, homogeneous perovskite films via a one-step, antisolvent-free coating.
Thermomechanical and environmental stability were significantly improved, with fracture energy exceeding 5 J/m².
High photovoltaic performance was maintained, alongside enhanced photostability and thermal cycling resistance.

Conclusions:

Incorporating starch polymer into PSCs offers a viable strategy to overcome stability limitations.
The nanocomposite approach enhances material integrity and durability, paving the way for commercial PSC deployment.
This method maintains excellent optoelectronic properties and device performance.