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Vertical Cavity Biexciton Lasing in 2D Dodecylammonium Lead Iodide Perovskites
Advanced Optical Materials ( IF 8.0 ) Pub Date : 2018-08-31 , DOI: 10.1002/adom.201800616 Edward P. Booker 1 , Michael B. Price 1 , Peter J. Budden 1 , Haralds Abolins 1 , Yago del Valle-Inclan Redondo 1 , Lissa Eyre 1 , Iyad Nasrallah 1 , Richard T. Phillips 1 , Richard H. Friend 1 , Felix Deschler 1 , Neil C. Greenham 1
Advanced Optical Materials ( IF 8.0 ) Pub Date : 2018-08-31 , DOI: 10.1002/adom.201800616 Edward P. Booker 1 , Michael B. Price 1 , Peter J. Budden 1 , Haralds Abolins 1 , Yago del Valle-Inclan Redondo 1 , Lissa Eyre 1 , Iyad Nasrallah 1 , Richard T. Phillips 1 , Richard H. Friend 1 , Felix Deschler 1 , Neil C. Greenham 1
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Layered Ruddlesden‐Popper‐type (2D) metal‐halide perovskites exhibit markedly increased exciton binding energies, exceeding 150 meV, compared to their 3D counterparts. Many‐body physics, enabled by Coulomb interactions, plays a strong role and raises the biexciton binding energy to 50 meV. Here, photoluminescence at a range of temperatures and carrier concentrations in thin films of the layered perovskite material (C12H25NH3)2PbI4 is reported. Biexcitons are directly observed up to a sample temperature of 225 K. An optical microcavity (comprising a distributed Bragg reflector and a metal mirror), with photonic resonances tuned near to the biexciton energy, is constructed. Optically‐pumped biexciton lasing up to 125 K, with a threshold peak excitation density of 5.6 × 1018 cm−3, is observed. The demonstration of biexciton lasing above liquid nitrogen temperatures is a crucial step for the application of layered perovskites in photonic applications.
中文翻译：
二维十二烷基铵铅碘化物钙钛矿中的垂直腔双激子激射
与3D对应物相比，分层的Ruddlesden-Popper型（2D）金属卤化物钙钛矿具有显着增加的激子结合能，超过150 meV。库仑相互作用使多体物理学发挥了重要作用，并将双激子结合能提高到50 meV。在此，层状钙钛矿材料（C 12 H 25 NH 3）2 PbI 4的薄膜在一定温度和载流子浓度范围内的光致发光被报道。在样品温度高达225 K的情况下，都可以直接观察到双激子。构造了一个光学微腔（包含分布式布拉格反射器和金属镜），其光子共振被调至接近双激子能量。观察到高达125 K的光泵激双激子激射，阈值峰值激发密度为5.6×10 18 cm -3。液氮温度以上双激子激射的证明是层状钙钛矿在光子应用中的关键步骤。
更新日期：2018-08-31
中文翻译：
二维十二烷基铵铅碘化物钙钛矿中的垂直腔双激子激射
与3D对应物相比，分层的Ruddlesden-Popper型（2D）金属卤化物钙钛矿具有显着增加的激子结合能，超过150 meV。库仑相互作用使多体物理学发挥了重要作用，并将双激子结合能提高到50 meV。在此，层状钙钛矿材料（C 12 H 25 NH 3）2 PbI 4的薄膜在一定温度和载流子浓度范围内的光致发光被报道。在样品温度高达225 K的情况下，都可以直接观察到双激子。构造了一个光学微腔（包含分布式布拉格反射器和金属镜），其光子共振被调至接近双激子能量。观察到高达125 K的光泵激双激子激射，阈值峰值激发密度为5.6×10 18 cm -3。液氮温度以上双激子激射的证明是层状钙钛矿在光子应用中的关键步骤。
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