Operational Mechanism of Conjugated Polyelectrolytes
详细信息 查看全文
- 作者：Daniel Tordera ; Martijn Kuik ; Zachary D. Rengert ; Enrico Bandiello ; Henk J. Bolink ; Guillermo C. Bazan ; Thuc-Quyen Nguyen
- 刊名：Journal of the American Chemical Society
- 出版年：2014
- 出版时间：June 18, 2014
- 年：2014
- 卷：136
- 期：24
- 页码：8500-8503
- 全文大小：262K
- 年卷期：v.136,no.24(June 18, 2014)
- ISSN：1520-5126
文摘
Conjugated polyelectrolytes (CPEs) are versatile materials used in a range of organic optoelectronic applications. Because of their ionic/electronic nature, characterizing these materials is nontrivial, and their operational mechanism is not fully understood. In this work we use a methodology that combines constant-voltage-driven current-density transient measurements with fast current vs voltage scans to allow decoupling of ionic and electronic phenomena. This technique is applied to diodes prepared with cationic CPEs having different charge-compensating anions. Our results indicate that the operational mechanism of these devices is governed by electrochemical doping of the CPE. On the basis of the notion that the saturated depletion layer for the anions consists of the same 蟺-conjugated backbone material, we discern how the extent and speed of formation of the doped region depend on the anion structure. Apart from addressing fundamental transport questions, this work provides a tool for future characterization of different CPEs and other similar systems.