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Updated: Sep 9, 2025

Monovalent Cation Doping of CH3NH3PbI3 for Efficient Perovskite Solar Cells
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Monovalent Cation Doping of CH3NH3PbI3 for Efficient Perovskite Solar Cells

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ハロゲン/カルコゲンの置換が,非対称な受容体合金の介電常数に及ぼす影響,逆転有機光伏の効率と安定性を向上させる

Yan-Bo Wang1, Yung-Jing Xue1, Chieh-Ming Hung2

  • 1Department of Applied Chemistry, National Yang Ming Chiao Tung University 1001 University Road Hsinchu 30010 Taiwan yjcheng@nycu.edu.tw.

Chemical science
|September 4, 2025
PubMed
まとめ

有機太陽電池でブロムとセレニウムを入れ替えると 介電常数と結晶パッキングが強化されます この分子設計の進歩はデバイスの性能を向上させ,高電力変換効率につながります.

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ortho–para-Directing Deactivators: Halogens01:24

ortho–para-Directing Deactivators: Halogens

Halogens are ortho–para directors. They are more electronegative than carbon. Therefore, as ring substituents, they can withdraw electrons through the inductive effect and deactivate the aromatic ring towards electrophilic substitution. Halogens also have an electron-donating resonance effect on the ring, which influences the orientation of the incoming electrophile. If an electrophile attacks at the ortho or the para position, the halogen donates electrons and stabilizes the intermediate...
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Alkyl halides are halogen-substituted alkanes wherein one or more hydrogen atoms of an alkane is replaced by a halogen atom such as fluorine, chlorine, bromine, or iodine. The carbon atom in an alkyl halide is bonded to the halogen atom, which is sp3-hybridized and exhibits a tetrahedral shape.
Unlike alkyl halides, compounds in which a halogen atom is bonded to an sp2 -hybridized carbon atom of a carbon-carbon double bond (C=C) are called vinyl halides. Whereas aryl...
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Halogenation is the addition of chlorine or bromine across the double bond in an alkene to yield a vicinal dihalide. The reaction occurs in the presence of inert and non-nucleophilic solvents, such as methylene chloride, chloroform, or carbon tetrachloride.
Consider the bromination of cyclopentene. Molecular bromine is polarized in the proximity of the π electrons of cyclopentene. An electrophilic bromine atom adds across the double bond, forming a cyclic bromonium ion intermediate.
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