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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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相关实验视频

Updated: Jul 1, 2025

Flash Infrared Annealing for Perovskite Solar Cell Processing

Flash Infrared Annealing for Perovskite Solar Cell Processing

Published on: February 3, 2021

无添加剂的基于Pyrene的孔运输材料使得高效和稳定的矿太阳能电池成为可能.

Xianfu Zhang^1,2, Xuepeng Liu¹, Farzaneh Fadaei Tirani²

¹Beijing Key Laboratory of Novel Thin-Film Solar Cells, North China Electric Power University, Beijing, 102206, China.

Angewandte Chemie (International ed. in English)

|March 4, 2024

概括

一种新的星形分子Py-DB增强了矿太阳能电池 (PSC) 的稳定性和效率. 这种无添加剂的孔运输材料 (HTM) 实现了创纪录的24.33%的功率转换效率,并在恶劣条件下保持性能.

关键词:

无多剂的无多剂.孔运输材料的运输材料.矿太阳能电池是如何使用的太阳能光伏发电是如何实现的二烯是什么? 二烯是什么? 二烯是什么?

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相关实验视频

Last Updated: Jul 1, 2025

Flash Infrared Annealing for Perovskite Solar Cell Processing

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Monovalent Cation Doping of CH3NH3PbI3 for Efficient Perovskite Solar Cells

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Low Pressure Vapor-assisted Solution Process for Tunable Band Gap Pinhole-free Methylammonium Lead Halide Perovskite Films

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Published on: September 8, 2017

科学领域:

材料科学材料科学材料科学
可再生能源可再生能源是可再生能源.
太阳能光伏发电是如何实现的

背景情况:

无添加剂的孔输送材料 (HTM) 对矿太阳能电池 (PSC) 的长期稳定性至关重要.
开发高效和稳定的HTM是推进PSC技术的关键.

研究的目的:

设计和合成一种新的星形胺HTM,Py-DB,用于无多PSC.
调查Py-DB的结构-财产关系及其对PSC业绩和稳定性的影响.

主要方法:

合成了一种新型的星形亚利胺HTM (Py-DB) 与烯核和碳-碳双键.
使用Py-DB作为HTM的矿太阳能电池的制造和表征.
性能测试包括功率转换效率 (PCE) 和在受控环境压力下长期稳定性.

主要成果:

与参考材料相比,Py-DB HTM表现出增强的分子间π-π堆叠,提高溶解度,更高的孔移动性和更好的薄膜形态.
基于Py-DB的PSC在n-i-p配置的无多小分子HTM中实现了24.33%的创纪录功率转换效率.
这些设备表现出了很好的长期稳定性,在经过1000小时的湿度和热应激后,保持了超过90%的初始效率.

结论:

新的Py-DB HTM显著提高了矿太阳能电池的效率和稳定性.
星形分子设计和扩展结合是开发高性能无多剂HTM的有效策略.
这项工作为为未来的光伏应用设计高效可靠的HTM提供了宝贵的见解.