Study on energy-transfer in an organic-inorganic material

有机-无机材料中的能量传递研究

• 批准号: 13440100
• 负责人: EMA Kazuhiro
• 金额: $ 8.51万
• 依托单位: Sophia University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-13440100/
• 关键词: organic-inorganic material; exciton; energy transfer; quantum-well material; Dexter mechanism; low-dimensional material; 有機・無機複合型物質

We investigated energy transfer from excitons to organic materials in an organic-inorganic quantum-well material, (C_4H_9NH_3)_2PbBr_4, which is a layered perovskite-type quantum-well material. It has inorganic well layers composed of two-dimensional network of corner-sharing [PbBr_6]^4 octahedra between organic barrier layers of alkyl ammonium chains. Excitons are tightly confined in the inorganic well layers and have extremely large binding energy (- 400 meV). Strong excitonic photoluminescence (PL) are clearly observed at 3.014 eV. On the other hand, (C_10H_7CnH_<2n+1>NH_3)_2PbBr_4 and (C_10H_7OCnH_<2n+1>NH_3)_2PbBr_4 in which naphthalene molecules are doped into organic barrier layers show little PL from the excitons but show strongly enhanced phosphorescence from the triplet state of naphthalene molecules. The PL excitation measurements have shown that the enhanced phosphorescence is caused by energy transfer from the excitons. We investigated the dynamics of the energy transfer by time-resolved PL measurements using the samples which are controlled the distance between the naphthalene molecules and the excitons.

我们研究了有机无机量子孔材料（C_4H_9NH_3）_2pbbr_4中从激子到有机材料的能量转移，这是一种分层的钙钛矿型量子孔材料。它具有无机井层层，由二维烷基铵链有机屏障层之间的二维网络组成[PBBR_6]^4八面体。激子紧密限制在无机井层中，并具有极大的结合能（-400 meV）。在3.014 eV处清楚地观察到强烈的激发光发光（PL）。另一方面，（C_10H_7CNH_ <2n+1> NH_3）_2PBBR_4和（C_10H_7OCNH_ <2n+1> NH_3）_2pbbr_4，其中萘甲烯分子含有强烈的PL，但显示出有机屏障的强烈pl，显示出有机式的pl仪表萘分子的状态。 PL激发测量结果表明，增强的磷光是由激子的能量转移引起的。我们使用按时间分辨的PL测量来调查了能量转移的动力学，该样品使用萘分子和激子之间的距离进行了控制。

项目成果

江馬一弘: "無機有機複合型量子井戸構造の励起子"日本物理学会誌. 58. 20-28 (2003)

Kazuhiro Ema：“无机-有机复合量子阱结构中的激子”日本物理学会杂志 58. 20-28 (2003)。

江馬一弘: "有機・無機複合型物質の励起子"パリティ. 16. 12-18 (2001)

Kazuhiro Ema：“有机-无机复合材料中的激子”Parity 16. 12-18 (2001)。

J.Ishi: "Influence of exciton-exciton interactions on frequency-mixing signals in a stable exciton-biexciton system"Phys. Rev. B. 63. 073303 (2001)

J.Ishi：“激子-激子相互作用对稳定激子-双激子系统中混频信号的影响”Phys。

江間一弘: "無機有機複合型量子井戸構造の励起子"日本物理学会誌. 58. 20-28 (2003)

Kazuhiro Ema：“无机-有机复合量子阱结构中的激子”日本物理学会杂志 58. 20-28 (2003)。

J.Ishi: "Influence of exciton-exciton interactions on frequency-mixing signals in a table exciton-biexciton system"Phys.Rev.B. 63. 073303 (2001)

J.Ishi：“激子-激子相互作用对表激子-双激子系统中混频信号的影响”Phys.Rev.B。