Induced absorption and spontaneous emission due to biexciton in two-dimensional semiconductor (CH3C6H4CH2NH3)2PbBr4 single crystal
Induced absorption and spontaneous emission due to biexciton in two-dimensional semiconductor (CH3C6H4CH2NH3)2PbBr4 single crystal
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DOI：
10.1016/j.jlumin.2004.09.081
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发表时间：
2005-04
影响因子：
3.6
通讯作者：
H. Makino;T. Goto;T. Yao;G. Mousdis;G. Papavassiliou
中科院分区：
文献类型：
--
作者：
H. Makino;T. Goto;T. Yao;G. Mousdis;G. Papavassiliou
本文研究了二维半导体（CH{sub 3}C{sub 6}H{sub 4}CH{sub 2}NH{sub 3}）{sub 2}PbBr{sub 4}单晶的光学性质。在吸收光谱和发射光谱中都观察到了清晰的、尖锐的结构，这些结构起源于偶极允许激子和三重态激子。在高激发态发射光谱中，随着激发强度的增加，出现了双激子发射。一个非常大的双激子结合能为40毫电子伏的估计。我们可以观察到诱导吸收和发射由于双激子形成的第一次。
We examined the optical properties of two-dimensional semiconductor (CH{sub 3}C{sub 6}H{sub 4}CH{sub 2}NH{sub 3}){sub 2}PbBr{sub 4} single crystals. Clear and sharp structures, originated in dipole allowed excitons and triplet excitons, were observed in both absorption and emission spectra. In the highly excited emission spectra, biexciton emission appeared with the increase of excitation intensity. An extremely large biexciton binding energy of 40 meV was estimated. We could observe both induced absorption and emission due to biexciton formation for the first time.