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

Feng Li; Hong Wang; Dominik Kufer; Liangliang Liang; Weili Yu; Erkki Alarousu; Chun Ma; Yangyang Li; Zhixiong Liu; Changxu Liu; Nini Wei; Fei Wang; Lang Chen; Omar F Mohammed; Andrea Fratalocchi; Xiaogang Liu; Gerasimos Konstantatos; Tom Wu

doi:10.1002/adma.201602432

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

Adv Mater. 2017 Apr;29(16). doi: 10.1002/adma.201602432. Epub 2017 Feb 22.

Authors

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 Konstantatos^{2

9}, Tom Wu¹

Affiliations

¹ Materials Science and Engineering, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia.
² ICFO-Institut de Ciencies Fotoniques, Mediterranean Technology Park, 08860, Castelldefels, Barcelona, Spain.
³ Department of Chemistry, National University of Singapore, Singapore, 117543, Singapore.
⁴ Solar and Photovoltaics Engineering Research Center, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia.
⁵ PRIMALIGHT, Faculty of Electrical Engineering, Applied Mathematics and Computational Science, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia.
⁶ Core lab, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia.
⁷ Department of Electronic and Electrical Engineering, South University of Science and Technology of China, Shenzhen, 518055, P. R. China.
⁸ Department of Physics, South University of Science and Technology of China, Shenzhen, 518055, P. R. China.
⁹ ICREA-Institució Catalana de Recerca i Estudis Avançats, Passeig Lluís Companys 23, 08010, Barcelona, Spain.

PMID: 28225207
DOI: 10.1002/adma.201602432

Abstract

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.

Keywords: carbon nanotubes; mobility; perovskite; photodetectors; phototransistors.