Tuning the Orientation of Self-Assembled CsPbBr3 Perovskite Nanoplatelet Superlattices through Ligand Engineering

Dongryeol Lee,1‡ Sung Yong Bae,2,3,4‡ Junzhi Ye,4,5‡ Woo Hyeon Jeong4,6, Chia-Yu Chang4, Jongbeom Kim,1Bo Ram Lee,6 Gi-Hwan Kim,2* Hyosung Choi,3* Myoung Hoon Song1* and Robert L. Z. Hoye4*

1 Department of Material Science and Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
2 Department of Materials Engineering and Convergence Technology, Gyeongsang National University (GNU), Jinju 52828, Republic of Korea
3 Department of Chemistry, Research Institute for Natural Sciences, and Research Institute for Convergence of Basic Science, Hanyang University, Seoul 04763, Republic of Korea
4 Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QR, United Kingdom
5 Institute of Polymer Optoelectronic Materials and Devices, Guangdong Basic Research Center of Excellence for Energy & Information Polymer Materials, State Key Laboratory of Luminescent Materials and Devices, School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China
6 School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea


Main Text: 
Raw data is store in xlsx files. It can be opened in excel. 

Figure 1
E: Distribution of lateral dimension for NPLs. Data obtained by Dongryeol Lee, Sung Yong Bae and Chia-Yu Chang.
F: Fourier transform infrared spectra of each NPLs. Data obtained by Dongryeol Lee.
G: 1H-NMR spectra of NPLs disolved in deuterated DMSO. Data obtained by Dongryeol Lee and Jongbeom Kim

Figure 2
D: Line-cut profiles extracted from GIWAXS data for each NPL film. Data obtained by Dongryeol Lee and Sung Yong Bae.
E and F: Polarization-dependent normalized PL intensity of NPL films. Data obtained by Dongryeol Lee and Sung Yong Bae.
G-I: Angle-dependent PL emission profiles of NPL films. Data obtained by Dongryeol Lee.

Figure 3
A-C: In-situ PL spectra during the formation of each NPLs in colloidal solution. Data obtained by Dongryeol Lee.
D-F: Evolution of PL intensity at the peak emission wavelength. Data obtained by Dongryeol Lee.

Figure 4
C: Current density–voltage (J–V) curves for NPL-LEDs. Data obtained by Dongryeol Lee.
D: Luminance–voltage (L–V) curves for NPL-LEDs. Data obtained by Dongryeol Lee.
E: EQE–current density curves for NPL-LEDs. Data obtained by Dongryeol Lee.
F: EQE histogram of NPL-LEDs.Data obtained by Dongryeol Lee.


Supplementary Information

Figure S2
XRD patterns of CsPbBr3 NPL films. Data obtained by Dongryeol Lee, Sung Yong Bae.

Figure S5
X-ray photoelectron spectroscopy profiles for each NPL films. Data obtained by Dongryeol Lee.

Figure S6
A: Time-resolved PL decay of NPL colloidal solutions. Data obtained by Dongryeol Lee.
B: Photoluminescence quantum yield of NPL colloidal solutions. Data obtained by Dongryeol Lee.

Figure S7
Distribution of thickness and aspect ratio for each NPLs. Data obtained by Dongryeol Lee, Sung Yong Bae and Chia-Yu Chang.

Figure S8
PL spectra and UV-vis absorption spectra of NPL solutions. Data obtained by Dongryeol Lee.

Figure S9
Line-cut profiles extracted from GIWAXS data for control NPL film. Data obtained by Dongryeol Lee and Sung Yong Bae.

Figure S10
Azimuthal line cut profiles extracted from the (100) Bragg reflection for each NPL film. Data obtained by Dongryeol Lee and Sung Yong Bae.

Figure S11
DSC curves of CsPbBr3 NPL films. Data obtained by Dongryeol Lee and Sung Yong Bae.

Figure S12
Additional polarization-dependent normalized PL intensity of NPL films. Data obtained by Dongryeol Lee and Sung Yong Bae.

Figure S13
Angle-dependent PL emission spectra acquired at 0°, 30°, 60°, and 90° for each NPL films. Data obtained by Dongryeol Lee.

Figure S14
Normalized EL spectra of each NPL-LEDs. Data obtained by Dongryeol Lee.