瑞典林雪平大学Simone Fabiano研究组取得一项新进展。他们的研究实现了有机半导体(OSC)的光催化掺杂。该项研究成果发表在2024年5月15日出版的《自然》上。

据介绍，化学掺杂是控制有机半导体(OSC)中载流子浓度和输运的重要方法，并最终提高器件属性。然而，传统的掺杂策略往往依赖于高活性(强)掺杂物的使用，这些掺杂物在掺杂过程中被消耗。在温和的条件下，用弱和/或广泛可及的掺杂剂实现有效掺杂仍然是一个挑战。

该研究组报告了一种先前未报道的OSC光催化掺杂的概念，该概念将空气作为弱氧化剂(p-掺杂剂)并在室温下操作。这是一种通用的方法，可以应用于各种OSC和光催化剂，产生了超过3,000 S cm^-1的电导。

该研究组还展示了成功的光催化还原(n-掺杂)和同时p-掺杂与n-掺杂的OSC，其中用于保持电荷中性的有机盐是唯一消耗的化学物质。他们的光催化掺杂方法为推进OSC掺杂和开发下一代有机电子器件提供了巨大的潜力。

附：英文原文

Title: Photocatalytic doping of organic semiconductors

Author: Jin, Wenlong, Yang, Chi-Yuan, Pau, Riccardo, Wang, Qingqing, Tekelenburg, Eelco K., Wu, Han-Yan, Wu, Ziang, Jeong, Sang Young, Pitzalis, Federico, Liu, Tiefeng, He, Qiao, Li, Qifan, Huang, Jun-Da, Kroon, Renee, Heeney, Martin, Woo, Han Young, Mura, Andrea, Motta, Alessandro, Facchetti, Antonio, Fahlman, Mats, Loi, Maria Antonietta, Fabiano, Simone

Issue&Volume: 2024-05-15

Abstract: Chemical doping is an important approach to manipulating charge-carrier concentration and transport in organic semiconductors (OSCs)1,2,3 and ultimately enhances device performance4,5,6,7. However, conventional doping strategies often rely on the use of highly reactive (strong) dopants8,9,10, which are consumed during the doping process. Achieving efficient doping with weak and/or widely accessible dopants under mild conditions remains a considerable challenge. Here, we report a previously undescribed concept for the photocatalytic doping of OSCs that uses air as a weak oxidant (p-dopant) and operates at room temperature. This is a general approach that can be applied to various OSCs and photocatalysts, yielding electrical conductivities that exceed 3,000Scm–1. We also demonstrate the successful photocatalytic reduction (n-doping) and simultaneous p-doping and n-doping of OSCs in which the organic salt used to maintain charge neutrality is the only chemical consumed. Our photocatalytic doping method offers great potential for advancing OSC doping and developing next-generation organic electronic devices.

DOI: 10.1038/s41586-024-07400-5

Source: https://www.nature.com/articles/s41586-024-07400-5