{"title":"Photogeneration of Charge Carriers in Organic Solar Cells: The Role of Nonequilibrium States for Electrons and Holes","authors":"L. V. Lukin","doi":"10.1134/S1990793124701458","DOIUrl":null,"url":null,"abstract":"<p>The aim of this study is to consider the photogeneration of charge carriers in nano-structured blends of the donor (D) and acceptor (A) materials. The optical excitation photons absorbed in one of these materials produce intramolecular excitons which can diffuse into the D–A interface and form interfacial CT states at the interface. The interfacial CT state dissociates into a geminate pair of the nonequilibrium mobile electron and hole. In this study, an empirical model describing thermalization of the nonequilibrium charges within the Coulomb well is proposed. The efficiency of the interfacial CT state’s dissociation into a pair of free charges is found as a function of the electric field applied, effective temperature, and diffusion length of the nonequilibrium electron-hole pairs.</p>","PeriodicalId":768,"journal":{"name":"Russian Journal of Physical Chemistry B","volume":"18 6","pages":"1534 - 1549"},"PeriodicalIF":1.4000,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Russian Journal of Physical Chemistry B","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1134/S1990793124701458","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"PHYSICS, ATOMIC, MOLECULAR & CHEMICAL","Score":null,"Total":0}
引用次数: 0
Abstract
The aim of this study is to consider the photogeneration of charge carriers in nano-structured blends of the donor (D) and acceptor (A) materials. The optical excitation photons absorbed in one of these materials produce intramolecular excitons which can diffuse into the D–A interface and form interfacial CT states at the interface. The interfacial CT state dissociates into a geminate pair of the nonequilibrium mobile electron and hole. In this study, an empirical model describing thermalization of the nonequilibrium charges within the Coulomb well is proposed. The efficiency of the interfacial CT state’s dissociation into a pair of free charges is found as a function of the electric field applied, effective temperature, and diffusion length of the nonequilibrium electron-hole pairs.
期刊介绍：
Russian Journal of Physical Chemistry B: Focus on Physics is a journal that publishes studies in the following areas: elementary physical and chemical processes; structure of chemical compounds, reactivity, effect of external field and environment on chemical transformations; molecular dynamics and molecular organization; dynamics and kinetics of photoand radiation-induced processes; mechanism of chemical reactions in gas and condensed phases and at interfaces; chain and thermal processes of ignition, combustion and detonation in gases, two-phase and condensed systems; shock waves; new physical methods of examining chemical reactions; and biological processes in chemical physics.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
