Synthesis and Photoluminescence Properties of 2D Phenethylammonium Lead Bromide Perovskite Nanocrystals

Rui Guo; Zhuan Zhu; Abdelaziz Boulesbaa; Fang Hao; Alexander Puretzky; Kai Xiao; Jiming Bao; Yan Yao; Wenzhi Li

doi:10.1002/SMTD.201700245

Synthesis and Photoluminescence Properties of 2D Phenethylammonium Lead Bromide Perovskite Nanocrystals

Rui Guo, Zhuan Zhu, Abdelaziz Boulesbaa, Fang Hao, Alexander Puretzky, Kai Xiao, Jiming Bao, Yan Yao, Wenzhi Li

Functional Hybrid Nanomaterials

Research output: Contribution to journal › Article › peer-review

31 Scopus citations

Abstract

Organic–inorganic hybrid perovskites have emerged as promising optoelec-tronic materials for applications in photovoltaic and optoelectronic devices. Particularly, 2D layer-structured hybrid perovskites are of great interest due to their remarkable optical and electrical properties, which can be easily tuned by selecting suitable organic and inorganic moieties during the material synthesis. Here, the solution-phase growth of a large square-shaped single-crystalline 2D hybrid perovskite, phenethylammonium lead bromide (C₆H₅C₂H₄NH₃)₂PbBr₄ (PEPB), with thickness as few as 3 unit cell layers is demonstrated. Compared to bulk crystals, the 2D PEPB nanocrystals show a major blueshifted photo-luminescence (PL) peak at 409 nm indicating an increase in bandgap of 40 meV. Besides the major peak, two new PL peaks located at 480 and 525 nm are observed from the hybrid perovskite nanocrystals. PEPB nanocrystals with different thicknesses show different colors, which can be used to estimate the thickness of the nanocrystals. Time-resolved reflectance spectroscopy is used to investigate the exciton dynamics, which exhibits a biexponential decay with an amplitude-weighted lifetime of 16.7 ps. The high-quality 2D (C₆H₅C₂H₄NH₃)₂PbBr₄ nanocrystals are expected to have high PL quantum efficiency and potential applications for light-emitting devices.

Original language	English
Article number	1700245
Journal	Small Methods
Volume	1
Issue number	10
DOIs	https://doi.org/10.1002/SMTD.201700245
State	Published - Oct 16 2017

Funding

W.L. acknowledges the funding from the National Science Foundation (Grant Nos. CMMI-1334417 and DMR-1506640). Y.Y. acknowledges the TcSUH core funding and the National Science Foundation (No. CMMI-1400261). J.B. acknowledges support from the Robert A. Walch Foundation (E-1728). The time-resolved reflectance and part of the photoluminescence measurements were conducted at the Center for Nanophase Materials Sciences, which is a DOE Office of Science User Facility.

Funders	Funder number
National Science Foundation	DMR-1506640, CMMI-1334417, CMMI-1400261
Welch Foundation	E-1728
Office of Science

Keywords

2D nanocrystals
organic–inorganic hybrid perovskites
photoluminescence
time-resolved reflectance spectroscopy

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1002/SMTD.201700245

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title = "Synthesis and Photoluminescence Properties of 2D Phenethylammonium Lead Bromide Perovskite Nanocrystals",

abstract = "Organic–inorganic hybrid perovskites have emerged as promising optoelec-tronic materials for applications in photovoltaic and optoelectronic devices. Particularly, 2D layer-structured hybrid perovskites are of great interest due to their remarkable optical and electrical properties, which can be easily tuned by selecting suitable organic and inorganic moieties during the material synthesis. Here, the solution-phase growth of a large square-shaped single-crystalline 2D hybrid perovskite, phenethylammonium lead bromide (C6H5C2H4NH3)2PbBr4 (PEPB), with thickness as few as 3 unit cell layers is demonstrated. Compared to bulk crystals, the 2D PEPB nanocrystals show a major blueshifted photo-luminescence (PL) peak at 409 nm indicating an increase in bandgap of 40 meV. Besides the major peak, two new PL peaks located at 480 and 525 nm are observed from the hybrid perovskite nanocrystals. PEPB nanocrystals with different thicknesses show different colors, which can be used to estimate the thickness of the nanocrystals. Time-resolved reflectance spectroscopy is used to investigate the exciton dynamics, which exhibits a biexponential decay with an amplitude-weighted lifetime of 16.7 ps. The high-quality 2D (C6H5C2H4NH3)2PbBr4 nanocrystals are expected to have high PL quantum efficiency and potential applications for light-emitting devices.",

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author = "Rui Guo and Zhuan Zhu and Abdelaziz Boulesbaa and Fang Hao and Alexander Puretzky and Kai Xiao and Jiming Bao and Yan Yao and Wenzhi Li",

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AB - Organic–inorganic hybrid perovskites have emerged as promising optoelec-tronic materials for applications in photovoltaic and optoelectronic devices. Particularly, 2D layer-structured hybrid perovskites are of great interest due to their remarkable optical and electrical properties, which can be easily tuned by selecting suitable organic and inorganic moieties during the material synthesis. Here, the solution-phase growth of a large square-shaped single-crystalline 2D hybrid perovskite, phenethylammonium lead bromide (C6H5C2H4NH3)2PbBr4 (PEPB), with thickness as few as 3 unit cell layers is demonstrated. Compared to bulk crystals, the 2D PEPB nanocrystals show a major blueshifted photo-luminescence (PL) peak at 409 nm indicating an increase in bandgap of 40 meV. Besides the major peak, two new PL peaks located at 480 and 525 nm are observed from the hybrid perovskite nanocrystals. PEPB nanocrystals with different thicknesses show different colors, which can be used to estimate the thickness of the nanocrystals. Time-resolved reflectance spectroscopy is used to investigate the exciton dynamics, which exhibits a biexponential decay with an amplitude-weighted lifetime of 16.7 ps. The high-quality 2D (C6H5C2H4NH3)2PbBr4 nanocrystals are expected to have high PL quantum efficiency and potential applications for light-emitting devices.

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Synthesis and Photoluminescence Properties of 2D Phenethylammonium Lead Bromide Perovskite Nanocrystals

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