Ultrafast optical nonlinearity of blue-emitting perovskite nanocrystals

Junzi Li; Can Ren; Xin Qiu; Xiaodong Lin; Rui Chen; Cheng Yin; Tingchao He

doi:doi:10.1364/PRJ.6.000554

Photonics Research, 2018, 6 (6): 06000554, Published Online: Jul. 2, 2018

Ultrafast optical nonlinearity of blue-emitting perovskite nanocrystals Download： 570次

Junzi Li ^1†Can Ren ^1†Xin Qiu ¹Xiaodong Lin ¹Rui Chen ²Cheng Yin ³Tingchao He ^1,*

Author Affiliations

¹ College of Physics and Energy, Shenzhen University, Shenzhen 518060, China

² Department of Electrical and Electronic Engineering, South University of Science and Technology of China, Shenzhen 518055, China

³ Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China

Figures & Tables

Fig. 1. (a) Normalized linear absorption and fluorescence spectra for the perovskite NCs. The insets are the emission images of the NCs in solution: 1 for CsPbCl3 NCs and 2 for CsPb(Cl0.53Br0.47)3 NCs. TEM images of (b) CsPbCl3 NCs and (c) CsPb(Cl0.53Br0.47)3 NCs. The insets are high-resolution TEM images of the NCs. (d) Fluorescence decay kinetics of the perovskite NCs under excitation at 365 nm.

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Fig. 2. TA kinetics (a) for CsPbCl3 NCs probed at 398 nm and (c) for CsPb(Cl0.53Br0.47)3 NCs probed at 432 nm. Initially, the presence of biexcitons and even higher order multi-excitons causes a fast decay (Auger process). At time ≥1 ns, the signals decay exponentially, which corresponds to a single-exciton signal. GSB signal amplitude at a time delay of 1 ns as a function of excitation intensity for (b) CsPbCl3 NCs and (d) CsPb(Cl0.53Br0.47)3 NCs.

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Fig. 3. Measured fluorescence intensity as a function of the input laser intensity at 650 nm. The insets are the two-photon excited emission imaging of the NC solution and the best-fitting straight lines on logarithmic scales: 1 for CsPbCl3 NCs and 2 for CsPb(Cl0.53Br0.47)3 NCs. The concentration of CsPb(Cl0.53Br0.47)3 NCs solution is 1×10−6 M, while the concentration of CsPbCl3 NCs solution is 2.57×10−6 M.

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Fig. 4. (a) Divided Z-scan results of the OA signal for NCs at a wavelength of 650 nm. The solid lines are the fittings to the data using the Z-scan theory. (b) TPA spectra of NCs between 620 and 720 nm. The concentration of both CsPbCl3 and CsPb(Cl0.53Br0.47)3 NCs was 5.95×10−6 M.

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Fig. 5. (a) Divided Z-scan results of the CA signal by the OA signal at a wavelength of 650 nm. The solid lines are the fittings to the data using the Z-scan theory. (b) Wavelength-dependent intrinsic nonlinear refractive index of CsPb(Cl0.53Br0.47)3 NCs. The concentration of both CsPbCl3 and CsPb(Cl0.53Br0.47)3 NCs was 5.95×10−6 M.

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Fig. 6. Wavelength-dependent figure of merit (T) of CsPb(Cl0.53Br0.47)3 NCs.

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Table1. Calculated NLO Parameters of the CsPbCl3 and CsPb(Cl0.53Br0.47)3 NCs and Other Materials Reported Elsewhere

Samples	$λ$ _em (nm)	$σ_{2}$ (GM) or $β$ (cm/W)	$n_{2}$ (intrinsic) ( ${cm}^{2} / W$ )	References
$p$ -Septiphenyl	Violet-blue	880 GM (0.5 ps, 660 nm)	—	[27]
Ladder-type oligo( $p$ -phenylene)s	449 nm	1046 GM (120 fs, 880 nm)	—	[28]
Diphenylamino and 1,2,4-triazole endcapped oligofluorenes	422 nm	57 GM (100 fs, 800 nm)	—	[29]
Bis(styryl)benzene derivatives	455 nm	995 GM (725 nm)	—	[30]
ZnS	Violet-blue	21100 GM (28 ps, 532 nm) or 17200 GM (28 ps, 520 nm)	—	[31]
ZnSe/ZnS	420 nm or 408 nm	5100 GM or 13900 GM (100 fs, 806 nm)	—	[32]
ZnSe	420 nm or 408 nm	4900 GM or 12200 GM (100 fs, 806 nm)	—	[32]
Truxene-based star-shaped oligofluorenes	441 nm	2200 GM (120 fs, 800 nm)	—	[33]
1,4-Bis(carbazolyl)benzene derivatives	395 nm	448 GM (100 fs, 720 nm)	—	[34]
${CsPbCl}_{3}$	456 nm	$1.36 \times 10^{- 13} cm / W$ (396 fs, 787 nm)	$5.30 \times 10^{- 15}$ (396 fs, 787 nm)	[35]
${CsPbBr}_{3}$	460 nm	$- 1.71 \times 10^{- 13} cm / W$ (130 fs, 800 nm)	$- 5.18 \times 10^{- 13}$ (130 fs, 800 nm)	[36]
$CsPb {({Cl}_{0.53} {Br}_{0.47})}_{3}$	447 nm	28347 GM or $3.22 \times 10^{- 12} cm / W$ (100 fs, 630 nm)	$- 1.4 \times 10^{- 13}$ (100 fs, 620 nm)	This work
${CsPbCl}_{3}$	409 nm	6963 GM or $7.91 \times 10^{- 13} cm / W$ (100 fs, 630 nm)	$< - 0.46 \times 10^{- 13}$ (100 fs, 620 nm)	This work

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Junzi Li, Can Ren, Xin Qiu, Xiaodong Lin, Rui Chen, Cheng Yin, Tingchao He. Ultrafast optical nonlinearity of blue-emitting perovskite nanocrystals[J]. Photonics Research, 2018, 6(6): 06000554.

Ultrafast optical nonlinearity of blue-emitting perovskite nanocrystals Download： 570次

Fig. 4. (a) Divided Z-scan results of the OA signal for NCs at a wavelength of 650 nm. The solid lines are the fittings to the data using the Z-scan theory. (b) TPA spectra of NCs between 620 and 720 nm. The concentration of both CsPbCl3 and CsPb(Cl0.53Br0.47)3 NCs was 5.95×10−6 M.

Fig. 6. Wavelength-dependent figure of merit (T) of CsPb(Cl0.53Br0.47)3 NCs.

Table1. Calculated NLO Parameters of the CsPbCl3 and CsPb(Cl0.53Br0.47)3 NCs and Other Materials Reported Elsewhere

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Ultrafast optical nonlinearity of blue-emitting perovskite nanocrystals Download： 570次

Fig. 4. (a) Divided Z-scan results of the OA signal for NCs at a wavelength of 650 nm. The solid lines are the fittings to the data using the Z-scan theory. (b) TPA spectra of NCs between 620 and 720 nm. The concentration of both CsPbCl3 and CsPb(Cl0.53Br0.47)3 NCs was 5.95×10−6 M.

Fig. 6. Wavelength-dependent figure of merit (T) of CsPb(Cl0.53Br0.47)3 NCs.

Table1. Calculated NLO Parameters of the CsPbCl3 and CsPb(Cl0.53Br0.47)3 NCs and Other Materials Reported Elsewhere

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