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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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Related Experiment Video

Updated: Jan 9, 2026

Synthesis of In37P20O2CR51 Clusters and Their Conversion to InP Quantum Dots

Synthesis of In37P20O2CR51 Clusters and Their Conversion to InP Quantum Dots

Published on: May 7, 2019

Engineering indium phosphide quantum dots for solar-driven energy conversion applications.

Hongyang Zhao¹, Zhenwei Tang¹, Shuya Cui¹

¹School of Chemistry and Materials Engineering, Mianyang Normal University, Mianyang 621000, P. R. China. hongyang.z@mtc.edu.cn.

Nanoscale Horizons

|December 9, 2025

Summary

Colloidal indium phosphide (InP) quantum dots (QDs) offer a non-toxic, tunable alternative for solar energy. This review covers synthesis, enhancement strategies, and applications in catalysis for sustainable energy technologies.

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Area of Science:

Materials Science
Nanotechnology
Photochemistry

Background:

Colloidal indium phosphide (InP) quantum dots (QDs) are heavy metal-free nanomaterials with low toxicity.
Their size-tunable optoelectronic properties make them promising for solar energy applications.

Purpose of the Study:

To review synthetic techniques for high-quality InP QDs.
To discuss strategies for enhancing their photocatalytic (PC) and photoelectrochemical (PEC) performance.
To explore InP QDs applications in solar-driven energy conversion.

Main Methods:

Review of synthetic methods: hot-injection, heat-up, cluster-mediated growth, and cation exchange.
Discussion of enhancement strategies: core/shell engineering, hybrid ligand modification, and elemental doping.
Analysis of InP QDs-based systems for hydrogen evolution, CO2 reduction, ammonia synthesis, and H2O2 production.

Main Results:

Established various synthesis routes for high-quality InP QDs.
Demonstrated effective strategies for improving PC and PEC performance.
Highlighted the potential of InP QDs in diverse solar energy conversion processes.

Conclusions:

InP QDs present a viable, eco-friendly alternative for solar energy conversion.
Further research directions focus on low-cost, scalable, and high-efficiency QD-based technologies.
Overcoming current challenges will accelerate the adoption of InP QDs in sustainable energy solutions.