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Optical absorption and photoluminescence spectroscopy

Abdi Jalebi, M; Dar, MI; Sadhanala, A; Johansson, EMJ; Pazoki, M; (2019) Optical absorption and photoluminescence spectroscopy. In: Pazoki, M and Edvinsson, T and Hagfeldt, A, (eds.) Characterization Techniques for Perovskite Solar Cell Materials. (pp. 49-79). Elsevier: Amsterdam, Netherlands.

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Abstract

In this chapter, we summarize the optical absorption and photoluminescence (PL) spectroscopy of metal-halide perovskite semiconductors that are substantially important to understand their behavior in optoelectronic devices and estimate their performance limits. First, we introduce the most common methods to measure the optical absorption of perovskite materials and their limitations followed by the common methods of extracting optical bandgap. Then, we discuss the near bandgap states, the process of light absorption and exciton generation in metal-halide perovskites as well as tuning the optical bandgap of them via chemical modifications. Second, we explain the PL spectroscopy of perovskites and the process involved in it alongside the main extracted parameters including diffusion lengths and carrier lifetime. We also discuss the concept of photon recycling in halide perovskite as well as the exciton binding energy and excitonic peaks in PL. Furthermore, we show effective strategies to tune and stabilize the PL in metal-halide perovskite as well as the impact of crystallinity and charge extraction layers on the PL. Finally, we show the temperature dependency of PL in metal-halide perovskites.

Type: Book chapter
Title: Optical absorption and photoluminescence spectroscopy
ISBN-13: 9780128147283
DOI: 10.1016/B978-0-12-814727-6.00003-7
Publisher version: https://doi.org/10.1016/B978-0-12-814727-6.00003-7
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Optical absorption, Photoluminescence spectra, Optical bandgap, bandgap/emission tunability, Photoluminescent stability
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > MAPS Faculty Office
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > MAPS Faculty Office > Institute for Materials Discovery
URI: https://discovery.ucl.ac.uk/id/eprint/10091309
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