Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 57, Issue 26, Pages 7748-7752Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201802515
Keywords
2D materials; antennas; light-harvesting; nanowire laser arrays; Ruddlesden-Popper perovskites
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Funding
- Ministry of Science and Technology of China [2017YFA0204503]
- National Natural Science Foundation of China [21503139, 21521062, 21673144]
- Beijing Natural Science Foundation of China [2162011]
- High-level Teachers in Beijing Municipal Universities [IDHT20180517, CITTCD20180331]
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Miniaturized nanowire nanolasers of 3D perovskites feature a high gain coefficient; however, room-temperature optical gain and nanowire lasers from 2D layered perovskites have not been reported to date. A biomimetic approach is presented to construct an artificial ligh-harvesting system in mixed multiple quantum wells (QWs) of 2D-RPPs of (BA)(2)-(FA)(n-1)PbnBr3+1, achieving room-temperature ASE and nanowire (NW) lasing. Owing to the improvement of flexible and deformable characteristics provided by organic BA cation layers, high-density large-area NW laser arrays were fabricated with high photostability. Well-controlled dimensions and uniform geometries enabled 2D-RPPs NWs functioning as high-quality Fabry-Perot (FP) lasers with almost identical optical modes, high quality (Q) factor (ca. 1800), and similarly low lasing thresholds.
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