Ultrafast charge generation and relaxation dynamics in methylammonium lead bromide perovskites

Xiaofan Deng; Xiaoming Wen; Rui Sheng; Shujuan Huang; Takaaki Harada; Tak W. Kee; Martin A. Green; Anita Ho-Baillie

doi:10.1117/12.2202330

22 December 2015 Ultrafast charge generation and relaxation dynamics in methylammonium lead bromide perovskites

Xiaofan Deng; Xiaoming Wen; Rui Sheng; Shujuan Huang; Takaaki Harada; Tak W. Kee; Martin A. Green; Anita Ho-Baillie

Author Affiliations +

Proceedings Volume 9668, Micro+Nano Materials, Devices, and Systems; 966848 (2015) https://doi.org/10.1117/12.2202330
Event: SPIE Micro+Nano Materials, Devices, and Applications, 2015, Sydney, New South Wales, Australia

Abstract

Methylammonium Lead Bromide (CH₃NH₃PbBr₃) is a promising material for tandem solar cell due to its high band gap. Ultrafast optical techniques on a time scale of femto- and picosecond are used to investigate the carrier dynamics in CH₃NH₃PbBr₃. An ultrafast cooling of hot carriers occurs in sub-picoseconds in CH₃NH₃PbBr₃ by phonon scattering. Two ultrafast relaxation processes are attributed to optical phonon scattering and acoustic phonon scattering. The relaxation processes are evidently slower when CH₃NH₃PbBr₃ is in contact with compact TiO₂ (c-TiO₂) layer, suggesting better quality CH₃NH₃PbBr₃. when deposited on c-TiO₂. The nanosecond decay in CH₃NH₃PbBr₃ film is ascribed to electron-hole recombination. With the presence of c-TiO₂ layer, this process is accelerated due to electron transport across the CH₃NH₃PbBr₃/ c-TiO₂ interface.

Citation Download Citation

Xiaofan Deng, Xiaofan Deng, Xiaoming Wen, Xiaoming Wen, Rui Sheng, Rui Sheng, Shujuan Huang, Shujuan Huang, Takaaki Harada, Takaaki Harada, Tak W. Kee, Tak W. Kee, Martin A. Green, Martin A. Green, Anita Ho-Baillie, Anita Ho-Baillie, } "Ultrafast charge generation and relaxation dynamics in methylammonium lead bromide perovskites", Proc. SPIE 9668, Micro+Nano Materials, Devices, and Systems, 966848 (22 December 2015); doi: 10.1117/12.2202330; https://doi.org/10.1117/12.2202330

ACCESS THE FULL ARTICLE

PERSONAL SIGN IN
Full access may be available with your subscription

Email or Username Forgot your username?

Password Forgot your password?

Show

Remember Email/Username on this computer

Remember Password

No SPIE account? Create an account
or Institutional Sign In via Shibboleth

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $14.40

Non-members: $18.00 ADD TO CART

Show All Keywords

Keywords/Phrases

Search In:

Publication Years