Tuning exciton dynamics by the dielectric confinement effect in quasi-two-dimensional perovskites

Minghuan Cui; Chaochao Qin; Yuanzhi Jiang; Shichen Zhang; Changjiu Sun; Mingjian Yuan; Yonggang Yang; Yufang Liu

doi:10.1364/PRJ.500205

Photonics Research, Volume. 12, Issue 3, 563(2024)

Tuning exciton dynamics by the dielectric confinement effect in quasi-two-dimensional perovskites

Minghuan Cui^1、†, Chaochao Qin^1,4、†, Yuanzhi Jiang², Shichen Zhang¹, Changjiu Sun², Mingjian Yuan², Yonggang Yang^1,5, and Yufang Liu^1,3、*

Author Affiliations

¹Henan Key Laboratory of Infrared Materials & Spectrum Measures and Applications, Henan Normal University, Xinxiang 453007, China

²Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University, Tianjin 300071, China

³Institute of Physics, Henan Academy of Sciences, Zhengzhou 450046, China

⁴e-mail: qinchaochao@htu.edu.cn

⁵e-mail: yangyonggang@htu.edu.cn

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Figures & Tables(6)

Fig. 1. (a) Schematic illustration of the dielectric confinement effect in a quantum well structure. Note that εw is much larger than εb. (b) Schematic molecular structures of ethanolamine (EA+), p-fluorophenethylammonium (p-FPEA+), and phenethylammonium (PEA+). (c) Schematic crystal structure of EA2PbBr4, p-FPEA2PbBr4, and PEA2PbBr4. (d) UV-vis absorption (dashed line) and steady-state PL (solid line) spectra of EA2PbBr4, p-FPEA2PbBr4, and PEA2PbBr4 perovskite films. (e) XRD patterns of EA2PbBr4, p-FPEA2PbBr4, and PEA2PbBr4 perovskite films.

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Fig. 2. TA spectra (vis-pseudocolor representation) and TA dynamics (black dots and lines) of a representative probe wavelength for (a) EA2PbBr4, (b) p-FPEA2PbBr4, and (c) PEA2PbBr4 perovskite films. Note: The orange coordinate scale corresponds to the TA dynamics of a representative probe wavelength, and the black coordinate scale corresponds to the TA spectra. (d) PLQYs as a function of maximum phonon modulation amplitude. Inset: Coherent phonon dynamics (the residuals after subtracting the contribution of exciton population from origin kinetics) of three perovskite films. (e) Population dynamics of EA2PbBr4, p-FPEA2PbBr4, and PEA2PbBr4 perovskite films. (f) Coherent phonon circumvents the defect capture process in perovskite thin films.

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Fig. 3. (a) UV-vis absorption (dashed line) and steady-state PL (solid line) spectra of EA2MA3Pb4Br13, p-FPEA2MA3Pb4Br13, and PEA2MA3Pb4Br13 perovskite films. (b) XRD patterns of EA2MA3Pb4Br13, p-FPEA2MA3Pb4Br13, and PEA2MA3Pb4Br13 perovskite films. Temperature-dependent integrating PL intensity at different temperatures and corresponding fitting curves for (c) EA2MA3Pb4Br13, (d) p-FPEA2MA3Pb4Br13, and (e) PEA2MA3Pb4Br13 perovskite films. TA spectra (vis-pseudocolor representation) and TA dynamics (black dots and lines) of a representative probe wavelength for (f) EA2MA3Pb4Br13, (g) p-FPEA2MA3Pb4Br13, and (h) PEA2MA3Pb4Br13 perovskite films. Note: The orange ordinate scale corresponds to TA dynamics of a representative probe wavelength, and the black ordinate scale corresponds to TA spectra.

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Fig. 4. (a)–(c) TA spectra at representative delay times of EA2MA3Pb4Br13, p-FPEA2MA3Pb4Br13, and PEA2MA3Pb4Br13 perovskite films, respectively. Inset: Transfer processes in population dynamics of three perovskite films. (d) PLQYs as a function of maximum phonon modulation amplitude. Inset: Coherent phonon dynamics of the three perovskite films. (e) Biexciton Auger recombination kinetics. The circles, squares, and triangles represent the two-by-two subtraction (P2–P1, P3–P2, and P3–P1) from the TA population dynamics at three different pump fluences (P1, P2, and P3). The biexciton Auger recombination lifetime (τ) is obtained by averaging the three time constants from the fittings using a single exponential function.

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Table 1. Fitting Parameters of the GSB Kinetics of ⟨n⟩=1 Quasi-2D RPP Films

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Table 1. Fitting Parameters of the GSB Kinetics of ⟨n⟩=1 Quasi-2D RPP Films

	$τ_{1} / fs$ (Weight/%)	$τ_{2} / ps$ (Weight/%)	$τ_{3} / ps$ (Weight/%)
${EA}_{2} {PbBr}_{4}$	$247.2 \pm 27.8$ (48.7)	$3.4 \pm 0.24$ (26.8)	$32.9 \pm 4.3$ (24.5)
$p - {FPEA}_{2} {PbBr}_{4}$	$349.0 \pm 31.2$ (35.7)	$2.7 \pm 0.21$ (47.5)	$26.9 \pm 3.5$ (16.8)
${PEA}_{2} {PbBr}_{4}$	$353.0 \pm 24.8$ (26.5)	$2.3 \pm 0.19$ (55.6)	$21.9 \pm 2.3$ (17.9)

Table 2. Variation (ΔA, the last value—the initial value) of TA Population Dynamics and Transfer Ratio for EA₂MA₃Pb₄Br₁₃, p-FPEA₂MA₃Pb₄Br₁₃, and PEA₂MA₃Pb₄Br₁₃ Perovskite Films

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Table 2. Variation (ΔA, the last value—the initial value) of TA Population Dynamics and Transfer Ratio for EA₂MA₃Pb₄Br₁₃, p-FPEA₂MA₃Pb₄Br₁₃, and PEA₂MA₃Pb₄Br₁₃ Perovskite Films

	$Δ A_{n = 1}$ (mOD)	$Δ A_{n = 2}$ (mOD)	$Δ A_{n = 3}$ (mOD)	$Δ A_{n = 4}$ (mOD)	$Δ A_{n = \infty}$ (mOD)	Transfer Ratio (%)
${EA}_{2} {MA}_{3} {Pb}_{4} {Br}_{13}$	−4.7	—	—	—	—	35.5
$p - {FPEA}_{2} {MA}_{3} {Pb}_{4} {Br}_{13}$	−1.3	−7.4	−3.2	−0.5	6.7	54.0
${PEA}_{2} {MA}_{3} {Pb}_{4} {Br}_{13}$	−1.4	−2.8	−2.4	−0.4	6.5	92.8

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Minghuan Cui, Chaochao Qin, Yuanzhi Jiang, Shichen Zhang, Changjiu Sun, Mingjian Yuan, Yonggang Yang, Yufang Liu, "Tuning exciton dynamics by the dielectric confinement effect in quasi-two-dimensional perovskites," Photonics Res. 12, 563 (2024)

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Paper Information

Category: Optical and Photonic Materials

Received: Jul. 10, 2023

Accepted: Jan. 8, 2024

Published Online: Feb. 29, 2024

The Author Email: Yufang Liu (yf-liu@htu.edu.cn)

DOI:10.1364/PRJ.500205

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. Fitting Parameters of the GSB Kinetics of ⟨n⟩=1 Quasi-2D RPP Films

Table 1. Fitting Parameters of the GSB Kinetics of ⟨n⟩=1 Quasi-2D RPP Films

Table 2. Variation (ΔA, the last value—the initial value) of TA Population Dynamics and Transfer Ratio for EA2MA3Pb4Br13, p-FPEA2MA3Pb4Br13, and PEA2MA3Pb4Br13 Perovskite Films

Table 2. Variation (ΔA, the last value—the initial value) of TA Population Dynamics and Transfer Ratio for EA2MA3Pb4Br13, p-FPEA2MA3Pb4Br13, and PEA2MA3Pb4Br13 Perovskite Films

Table 2. Variation (ΔA, the last value—the initial value) of TA Population Dynamics and Transfer Ratio for EA₂MA₃Pb₄Br₁₃, p-FPEA₂MA₃Pb₄Br₁₃, and PEA₂MA₃Pb₄Br₁₃ Perovskite Films

Table 2. Variation (ΔA, the last value—the initial value) of TA Population Dynamics and Transfer Ratio for EA₂MA₃Pb₄Br₁₃, p-FPEA₂MA₃Pb₄Br₁₃, and PEA₂MA₃Pb₄Br₁₃ Perovskite Films