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题名: Enhanced Size Selection in Two-Photon Excitation for CsPbBr3 Perovskite Nanocrystals
作者: Chen, Junsheng1, 2, 3;  Chabera, Pavel1, 2;  Pascher, Torbjorn1, 2;  Messing, Maria E.4, 5;  Schaller, Richard6, 7;  Canton, Sophie8, 9;  Zheng, Kaibo1, 2, 10;  Pullerits, Tonu1, 2
刊名: JOURNAL OF PHYSICAL CHEMISTRY LETTERS
发表日期: 2017-10-19
DOI: 10.1021/acs.jpclett.7b02178
卷: 8, 期:20, 页:5119-5124
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Nanoscience & Nanotechnology ;  Materials Science, Multidisciplinary ;  Physics, Atomic, Molecular & Chemical
研究领域[WOS]: Chemistry ;  Science & Technology - Other Topics ;  Materials Science ;  Physics
英文摘要: Cesium lead bromide (CsPbBr3) perovskite nanocrystals (NCs), with large two-photon absorption (TPA) cross-section and bright photoluminescence (PL), have been demonstrated as stable two-photon-pumped lasing medium. With two-photon excitation, red-shifted PL spectrum and increased PL lifetime is observed compared with one-photon excitation. We have investigated the origin of such difference using time resolved laser spectroscopies. We ascribe the difference to the enhanced size selection of NCs by two-photon excitation. Because of inherent nonlinearity, the size dependence of absorption cross-section under TPA is stronger. Consequently, larger size NCs are preferably excited, leading to longer excited-state lifetime and red-shifted PL emission. In a broad view, the enhanced size selection in two-photon excitation of CsPbBr3 NCs is likely a general feature of the perovskite NCs and can be tuned via NC size distribution to influence their performance within NC-based nonlinear optical materials and devices.
关键词[WOS]: SHELL QUANTUM DOTS ;  ABSORPTION CROSS-SECTION ;  OPTICAL-DATA STORAGE ;  STIMULATED-EMISSION ;  FLUORESCENT-PROBE ;  LIVE CELLS ;  PHOTOLUMINESCENCE ;  PHOTOSTABILITY ;  EVOLUTION ;  SHIFT
语种: 英语
WOS记录号: WOS:000413798300024
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/149770
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Lund Univ, Dept Chem Phys, POB 124, S-22100 Lund, Sweden
2.Lund Univ, NanoLund, POB 124, S-22100 Lund, Sweden
3.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China
4.Lund Univ, Solid State Phys, Box 118, S-22100 Lund, Sweden
5.Lund Univ, NanoLund, Box 118, S-22100 Lund, Sweden
6.Argonne Natl Lab, Ctr Nanoscale Mat, 9700 Cass Ave, Argonne, IL 60439 USA
7.Northwestern Univ, Dept Chem, 2145 Sheridan Rd, Evanston, IL 60208 USA
8.ELI HU Nonprofit Ltd, ELI ALPS, Dugon Ter 13, H-6720 Szeged, Hungary
9.Deutsch Elektronen Synchrotron DESY, Attosci Grp, Notkestr 85, D-22607 Hamburg, Germany
10.Qatar Univ, Coll Engn, Gas Proc Ctr, POB 2713, Doha, Qatar

Recommended Citation:
Chen, Junsheng,Chabera, Pavel,Pascher, Torbjorn,et al. Enhanced Size Selection in Two-Photon Excitation for CsPbBr3 Perovskite Nanocrystals[J]. JOURNAL OF PHYSICAL CHEMISTRY LETTERS,2017,8(20):5119-5124.
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