Details

Autor(en) / Beteiligte

• Zeng, Cheng
• Zheng, Wenhao
• Xu, Hong
• Osella, Silvio
• Ma, Wei
• Wang, Hai I.
• Qiu, Zijie
• Otake, Ken‐ichi
• Ren, Wencai
• Cheng, Huiming
• Müllen, Klaus
• Bonn, Mischa
• Gu, Cheng
• Ma, Yuguang

Titel

Electrochemical Deposition of a Single‐Crystalline Nanorod Polycyclic Aromatic Hydrocarbon Film with Efficient Charge and Exciton Transport

Ist Teil von

• Angewandte Chemie (International ed.), 2022-03, Vol.61 (13), p.e202115389-n/a

Auflage

International ed. in English

Ort / Verlag

Germany: Wiley Subscription Services, Inc

Erscheinungsjahr

2022

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Electrochemical deposition has emerged as an efficient technique for preparing conjugated polymer films on electrodes. However, this method encounters difficulties in synthesizing crystalline products and controlling their orientation on electrodes. Here we report electrochemical film deposition of a large polycyclic aromatic hydrocarbon. The film is composed of single‐crystalline nanorods, in which the molecules adopt a cofacial stacking arrangement along the π–π direction. Film thickness and crystal size can be controlled by electrochemical conditions such as scan rate and electrolyte species, while the choice of anode material determines crystal orientation. The film supports exceptionally efficient migration of both free carriers and excitons: the free carrier mobility reaches over 30 cm2 V−1 s−1, whereas the excitons are delocalized with a low binding energy of 118.5 meV and a remarkable exciton diffusion length of 45 nm. Electrochemical film deposition of a single‐crystalline polycyclic aromatic hydrocarbon on electrodes, with synthetically controlled crystal structure, film thickness, and crystal orientations is reported. The film supports exceptionally efficient migration of both charges and excitons, with a free carrier mobility over 30 cm2 V−1 s−1, a low exciton binding energy of 118.5 meV, and a remarkable exciton diffusion length of 45 nm.