TY - JOUR
T1 - Electronic and Optical Modulation of Metal-Doped Hybrid Organic-Inorganic Perovskites Crystals by Post-Treatment Control
AU - Arramel,
AU - Xie, Aozhen
AU - Yin, Xinmao
AU - Tang, Chi Sin
AU - Mahyuddin, Muhammad Haris
AU - Hettiarachchi, Chathuranga
AU - Sahdan, Muhammad Fauzi
AU - Yoshizawa, Kazunari
AU - Dang, Cuong
AU - Birowosuto, Muhammad Danang
AU - Wee, Andrew Thye Shen
AU - Rusydi, Andrivo
N1 - Funding Information:
We acknowledge Wong How Kwong for his assistance during photoemission measurements. Xiaojiang Yu is appreciated for his technical support at the Singapore Synchrotron Light Source (SSLS). We declare that synchrotron facility plays indispensable part in this work as a National Research Infrastructure under the National Research Foundation Singapore. This work is financially supported by several funding agencies. Authors acknowledge a research grant from the MOE Tier 3 Programme (MOE2014-T3-1-004) and MOE Tier 2 Programme (MOE2018-T2-1-088). The work at SSLS is supported by Singapore National Research Foundation under its Competitive Research Funding (NRF-CRP 8-2011-06), MOE-AcRF Tier-2 (MOE2015-T2-1-099), FRC, and PHC Merlion. NTU authors acknowledge the funding from the Ministry of Education (MOE2016-T2-1-052). The theoretical computations were performed at the Research Institute for Information Technology of Kyushu University. M.H.M. acknowledges a research fund from the Institut Teknologi Bandung through the “Program Penelitian, Pengabdian kepada Masyarakat, dan Inovasi (P3MI)” Program.
Publisher Copyright:
Copyright © 2020 American Chemical Society.
PY - 2020/8/24
Y1 - 2020/8/24
N2 - Recently, considerable interest in the fields of photovoltaics, light emission, and photodetection absorbers has centered on hybrid organic-inorganic perovskites (HOIPs). Here, we report a combined photoluminescence and high-resolution photoemission study to investigate the defect-site passivation of the B-site methylammonium lead bromide perovskites (B site = In3+, Sr2+, and Li+). A distinctive behavior of the optical response is revealed by means of temperature-dependent time-resolved photoluminescence (TR-PL) measurements. Upon mild argon treatment, the initial thermal quenching rate with respect to the radiative transition rate (Δ0/Δv) ratio and thermal quenching activation energy (ΔEq) of Sr-doped MAPbBr3 is reduced by an order of magnitude. The average charge carrier lifetime (τave) of Sr-doped MAPbBr3 after treatment is significantly improved from 36 to 77 ns, respectively. Moreover, the occupied state of metal-doped MAPbBr3 probed by ultraviolet photoemission spectroscopy (UPS) indicates tunable charge transfer based on rational chemical design. Supported by density functional theory, small band gap changes are observed across Sr-, In-, and Li-doped cases. This work improves our understanding of the photophysics of HOIPs with the possible future aim of improving the stability of emergent perovskite materials by post-treatment control.
AB - Recently, considerable interest in the fields of photovoltaics, light emission, and photodetection absorbers has centered on hybrid organic-inorganic perovskites (HOIPs). Here, we report a combined photoluminescence and high-resolution photoemission study to investigate the defect-site passivation of the B-site methylammonium lead bromide perovskites (B site = In3+, Sr2+, and Li+). A distinctive behavior of the optical response is revealed by means of temperature-dependent time-resolved photoluminescence (TR-PL) measurements. Upon mild argon treatment, the initial thermal quenching rate with respect to the radiative transition rate (Δ0/Δv) ratio and thermal quenching activation energy (ΔEq) of Sr-doped MAPbBr3 is reduced by an order of magnitude. The average charge carrier lifetime (τave) of Sr-doped MAPbBr3 after treatment is significantly improved from 36 to 77 ns, respectively. Moreover, the occupied state of metal-doped MAPbBr3 probed by ultraviolet photoemission spectroscopy (UPS) indicates tunable charge transfer based on rational chemical design. Supported by density functional theory, small band gap changes are observed across Sr-, In-, and Li-doped cases. This work improves our understanding of the photophysics of HOIPs with the possible future aim of improving the stability of emergent perovskite materials by post-treatment control.
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U2 - 10.1021/acsaem.0c00916
DO - 10.1021/acsaem.0c00916
M3 - Article
AN - SCOPUS:85091097881
SN - 2574-0962
VL - 3
SP - 7500
EP - 7511
JO - ACS Applied Energy Materials
JF - ACS Applied Energy Materials
IS - 8
ER -