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Proceedings Paper

Ultrafast infrared spectroscopy reveals intragap states in methylammonium lead iodide perovskite materials
Author(s): Artem A. Bakulin; Huib J. Bakker; Zhenhua Sun; Zhuoying Chen
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Paper Abstract

Organic-inorganic hybrid materials have recently attracted a lot of attention for optoelectronic applications as they allow combining the flexibility and processibility of organic molecular systems with the good stability and charge-transport properties of inorganic crystalline materials. In this contribution, we report on the use of ultrafast vis-pump / infrared(IR)-probe spectroscopy to investigate the optical signature of charge carrier dynamics in CH3NH3PbI3 perovskite films. We observed that this perovskite shows a complex response which involves strong ground-state bleach contribution. This behaviour differs from most inorganic semiconductors and quantum dot materials that show strong photoinduced absorption in IR upon carrier generation,. The bleaching probably results from a partial filling of intragap states next to the conduction band edge. It may also indicate the existence of a Burstein–Moss type effect in perovskite materials.

Paper Details

Date Published: 9 September 2014
PDF: 5 pages
Proc. SPIE 9165, Physical Chemistry of Interfaces and Nanomaterials XIII, 91650U (9 September 2014); doi: 10.1117/12.2064068
Show Author Affiliations
Artem A. Bakulin, FOM Institute for Atomic and Molecular Physics (Netherlands)
Huib J. Bakker, FOM Institute for Atomic and Molecular Physics (Netherlands)
Zhenhua Sun, Lab. de Physique et d'Etude des Matériaux, CNRS, Univ. Pierre et Marie Curie (France)
Zhuoying Chen, Lab. de Physique et d'Etude des Matériaux, CNRS, Univ. Pierre et Marie Curie (France)


Published in SPIE Proceedings Vol. 9165:
Physical Chemistry of Interfaces and Nanomaterials XIII
Natalie Banerji; Sophia C. Hayes; Carlos Silva, Editor(s)

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