Amplified Spontaneous Emission Based on 2D Ruddlesden-Popper Perovskites
Li, Meili1,2; Gao, Qinggang3; Liu, Peng1,2; Liao, Qing3; Zhang, Haihua4; Yao, Jiannian4; Hu, Wenping1,2; Wu, Yishi4; Fu, Hongbing1,2,3
Abstract2D Ruddlesden-Popper perovskites (RPPs) are a class of quantum-well (QW) materials, composed of layered perovskite QWs encapsulated between two hydrophobic organic layers. Different from widely investigated 3D-perovskites with free carriers at room temperature, 2D-RPPs exhibit strongly bound electron-hole pairs (excitons) for high-performance solar cells and light emitting diodes (LEDs). Herein, it is reported that self-organized multiple QWs in 2D-RPP thin films naturally form an energy cascade, which enables an ultrafast energy transfer process from higher energy-bandgap QWs to lower energy-bandgap QWs. Therefore, photoexcitations are concentrated on lower-bandgap QWs, facilitating the build-up of population inversion. Room-temperature amplified spontaneous emission (ASE) from 2D-RPP thin films is achieved at dramatically low thresholds, with gain coefficients as high as >300 cm(-1), and stoichiometrically tunable ASE wavelengths from visible to near-infrared spectral range (530-810 nm). In view of the high efficiency reported for LEDs, these solution-processed 2D-RPP thin films may hold the key to realize electrically driven lasers.
Keyword2d-ruddlesden-popper Perovskites Amplified Spontaneous Emission Energy Cascades Energy Transfer Quantum-wells
Indexed BySCI
WOS IDWOS:000430658300016
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Cited Times:18[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorWu, Yishi; Fu, Hongbing
Affiliation1.Tianjin Univ, Sch Sci, Dept Chem, Tianjin Key Lab Mol Optoelect Sci, Tianjin 300072, Peoples R China
2.Collaborat Innovat Ctr Chem Sci & Engn Tianjin, Tianjin 300072, Peoples R China
3.Capital Normal Univ, Beijing Key Lab Opt Mat & Photon Device, Dept Chem, Beijing 100048, Peoples R China
4.Chinese Acad Sci, BNLMS, Inst Chem, Beijing 100190, Peoples R China
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GB/T 7714
Li, Meili,Gao, Qinggang,Liu, Peng,et al. Amplified Spontaneous Emission Based on 2D Ruddlesden-Popper Perovskites[J]. ADVANCED FUNCTIONAL MATERIALS,2018,28(17).
APA Li, Meili.,Gao, Qinggang.,Liu, Peng.,Liao, Qing.,Zhang, Haihua.,...&Fu, Hongbing.(2018).Amplified Spontaneous Emission Based on 2D Ruddlesden-Popper Perovskites.ADVANCED FUNCTIONAL MATERIALS,28(17).
MLA Li, Meili,et al."Amplified Spontaneous Emission Based on 2D Ruddlesden-Popper Perovskites".ADVANCED FUNCTIONAL MATERIALS 28.17(2018).
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