Photoexcitation dynamics in solution-processed formamidinium lead iodide perovskite thin films for solar cell applications

Light, Science & Applications
Hong-Hua FangMaria Antonietta Loi

Abstract

Formamidinium lead iodide (FAPbI3) is a newly developed hybrid perovskite that potentially can be used in high-efficiency solution-processed solar cells. Here, the temperature-dependent dynamic optical properties of three types of FAPbI3 perovskite films (fabricated using three different precursor systems) are comparatively studied. The time-resolved photoluminescence (PL) spectra reveal that FAPbI3 films made from the new precursor (a mixture of formamidinium iodide and hydrogen lead triiodide) exhibit the longest lifetime of 439 ns at room temperature, suggesting a lower number of defects and lower non-radiative recombination losses compared with FAPbI3 obtained from the other two precursors. From the temperature-dependent PL spectra, a phase transition in the films is clearly observed. Meanwhile, exciton-binding energies of 8.1 and 18 meV for the high- and low-temperature phases are extracted, respectively. Importantly, the PL spectra for all of the samples show a single peak at room temperature, whereas at liquid-helium temperature the emission features two peaks: one in higher energy displaying a fast decay (0.5 ns) and a second red-shifted peak with a decay of up to several microseconds. These two emissions, separated by ...Continue Reading

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Citations

May 27, 2016·Nature Communications·Adam D WrightLaura M Herz
Feb 19, 2019·Advanced Materials·Byung-Wook Park, Sang Il Seok
May 24, 2016·Reports on Progress in Physics·Euan McLeod, Aydogan Ozcan
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Dec 25, 2019·Light, Science & Applications·Sung Bum KangKyoung Jin Choi
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Mar 21, 2020·Light, Science & Applications·Kai-Kai LiuChong-Xin Shan
Sep 22, 2020·Physical Chemistry Chemical Physics : PCCP·Ufuk ErkılıçHiroki Ago
Nov 9, 2016·Scientific Reports·Ajay PerumalHilmi Volkan Demir
Aug 26, 2020·Nature Materials·Adam D WrightLaura M Herz
Feb 25, 2020·The Journal of Physical Chemistry Letters·Palvasha IjazRoman Krahne
Feb 26, 2021·ACS Applied Materials & Interfaces·Yansen SunFederico Rosei
Dec 12, 2020·Light, Science & Applications·Sung Bum KangKyoung Jin Choi
Mar 18, 2021·Light, Science & Applications·Kai-Kai LiuChong-Xin Shan
Feb 22, 2018·The Journal of Physical Chemistry Letters·Zhi-Xiang ZhangYu-Cheng Wu
Jul 24, 2018·The Journal of Physical Chemistry Letters·Christopher L DaviesLaura M Herz

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Methods Mentioned

BETA
X-ray
3 hybrid

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