Ultrahigh Carrier Mobility Achieved in Photoresponsive Hybrid Perovskite Films via Coupling with Single‐Walled Carbon Nanotubes

Advanced Materials - Tập 29 Số 16 - 2017
Feng Li1, Hong Wang1, Dominik Kufer2, Liangliang Liang3, Weili Yu4, Erkki Alarousu4, Chun Ma1, Yangyang Li1, Zhixiong Liu1, Changxu Liu5, Nini Wei6, Fei Wang7, Lang Chen8, Omar F. Mohammed4, Andrea Fratalocchi5, Xiaogang Liu3, Gerasimos Konstantatos2,9, Tom Wu1
1Materials Science and Engineering, King Abdullah University of Science and Technology, Thuwal, 23955-6900 Saudi Arabia
2ICFO-Institut de Ciencies Fotoniques, Mediterranean Technology Park, 08860 Castelldefels, Barcelona, Spain
3Department of Chemistry, National University of Singapore, Singapore 117543, Singapore
4Solar and Photovoltaics Engineering Research Center, King Abdullah University of Science and Technology, Thuwal, 23955-6900 Saudi Arabia
5PRIMALIGHT, Faculty of Electrical Engineering, Applied Mathematics and Computational Science, King Abdullah University of Science and Technology, Thuwal, 23955-6900 Saudi Arabia
6Core Lab, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia.
7Department of Electronic and Electrical Engineering, South University of Science and Technology of China, Shenzhen, 518055 P. R. China
8Department of Physics, South University of Science and Technology of China, Shenzhen, 518055 P. R. China
9ICREA, Institució Catalana de Recerca i Estudis Avançats, Passeig Lluís Companys 23, 08010 Barcelona, Spain

Tóm tắt

Organolead trihalide perovskites have drawn substantial interest for photovoltaic and optoelectronic applications due to their remarkable physical properties and low processing cost. However, perovskite thin films suffer from low carrier mobility as a result of their structural imperfections such as grain boundaries and pinholes, limiting their device performance and application potential. Here we demonstrate a simple and straightforward synthetic strategy based on coupling perovskite films with embedded single‐walled carbon nanotubes. We are able to significantly enhance the hole and electron mobilities of the perovskite film to record‐high values of 595.3 and 108.7 cm2 V−1 s−1, respectively. Such a synergistic effect can be harnessed to construct ambipolar phototransistors with an ultrahigh detectivity of 3.7 × 1014 Jones and a responsivity of 1 × 104 A W−1, on a par with the best devices available to date. The perovskite/carbon nanotube hybrids should provide a platform that is highly desirable for fields as diverse as optoelectronics, solar energy conversion, and molecular sensing.

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Advanced Materials

Tập 29 Số 16

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