当前位置：
X-MOL 学术
›
ACS Appl. Mater. Interfaces
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Understanding the Role of Ion Migration in the Operation of Perovskite Light-Emitting Diodes by Transient Measurements
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2020-10-16 , DOI: 10.1021/acsami.0c14269 Qi Dong 1 , Juliana Mendes 1 , Lei Lei 1 , Dovletgeldi Seyitliyev 2 , Liping Zhu 1 , Siliang He 3 , Kenan Gundogdu 2 , Franky So 1
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2020-10-16 , DOI: 10.1021/acsami.0c14269 Qi Dong 1 , Juliana Mendes 1 , Lei Lei 1 , Dovletgeldi Seyitliyev 2 , Liping Zhu 1 , Siliang He 3 , Kenan Gundogdu 2 , Franky So 1
Affiliation
|
Perovskite light-emitting diodes have been gaining attention in recent years due to their high efficiencies. Despite of the recent progress made in device efficiency, the operation mechanisms of these devices are still not well understood, especially the effects of ion migration. In this work, the role of ion migration is investigated by measuring the transient electroluminescence and current responses, with both the current and efficiency showing a slow response in a time scale of tens of milliseconds. The results of the charge injection dynamics show that the slow response of the current is attributed to the migration and accumulation of halide ions at the anode interface, facilitating hole injection and leading to a strong charge imbalance. Further, the results of the charge recombination dynamics show that the slow response of the efficiency is attributed to enhanced charge injection facilitated by ion migration, which leads to an increased carrier density favoring bimolecular radiative recombination. Through a combined analysis of both charge injection and recombination dynamics, we finally present a comprehensive picture of the role of ion migration in device operation.
中文翻译：
通过瞬态测量了解离子迁移在钙钛矿发光二极管工作中的作用
钙钛矿发光二极管由于其高效率而近年来受到关注。尽管最近在器件效率方面取得了进步，但是这些器件的操作机理，尤其是离子迁移的影响，仍未被很好地理解。在这项工作中，通过测量瞬态电致发光和电流响应来研究离子迁移的作用，电流和效率在数十毫秒的时间范围内均显示出缓慢的响应。电荷注入动力学的结果表明，电流的缓慢响应归因于卤化物离子在阳极界面处的迁移和累积，从而促进了空穴注入并导致强烈的电荷不平衡。进一步，电荷重组动力学的结果表明，效率的缓慢响应归因于离子迁移促进了电荷注入，从而导致载流子密度增加，有利于双分子辐射重组。通过对电荷注入和复合动力学的综合分析，我们最终给出了离子迁移在器件操作中的作用的全面描述。
更新日期：2020-10-29
中文翻译：
通过瞬态测量了解离子迁移在钙钛矿发光二极管工作中的作用
钙钛矿发光二极管由于其高效率而近年来受到关注。尽管最近在器件效率方面取得了进步，但是这些器件的操作机理，尤其是离子迁移的影响，仍未被很好地理解。在这项工作中，通过测量瞬态电致发光和电流响应来研究离子迁移的作用，电流和效率在数十毫秒的时间范围内均显示出缓慢的响应。电荷注入动力学的结果表明，电流的缓慢响应归因于卤化物离子在阳极界面处的迁移和累积，从而促进了空穴注入并导致强烈的电荷不平衡。进一步，电荷重组动力学的结果表明，效率的缓慢响应归因于离子迁移促进了电荷注入，从而导致载流子密度增加，有利于双分子辐射重组。通过对电荷注入和复合动力学的综合分析，我们最终给出了离子迁移在器件操作中的作用的全面描述。
京公网安备 11010802027423号