Brightly Luminescent and Moisture Tolerant Phenyl Viologen Lead Iodide Perovskites for Light Emission Applications

被引：6
作者：
Blundo, Elena [1 ]
Polimeni, Antonio [1 ]
Meggiolaro, Daniele [3 ]
D'Annibale, Andrea [2 ]
Romagnoli, Lorenza [2 ]
Felici, Marco [1 ]
Latini, Alessandro [2 ]
机构：
[1] Sapienza Univ Roma, Dipartimento Fis, I-00185 Rome, Italy
[2] Sapienza Univ Roma, Dipartimento Chim, I-00185 Rome, Italy
[3] Ist CNR Sci & Tecnol Chim Giulio Natta CNR SCITEC, Computat Lab Hybrid Organ Photovolta CLHYO, I-06123 Perugia, Italy
来源：
JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2021年 / 12卷 / 23期
关键词：
SOLAR-CELLS; MOBILITIES;
D O I：
10.1021/acs.jpclett.1c01271
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Lead halide perovskites are outstanding materials for optoelectronics, but they typically feature low stability against external agents. To overcome this drawback, LHPs based on quaternary ammonium cations, such as phenyl viologen lead iodide (PhVPI), were found to be promising candidates, being water-resistant and thermally stable. In this Letter, the optoelectronic properties of the PhVPI are investigated by a combined experimental-theoretical approach. Although the as-prepared material is photoluminescence-inactive, a short thermal (5 min @ 290 degrees C) or laser annealing turns PhVPI into a highly luminescent material, in the 600-1000 nm range. The PhVPI PL emission was characterized at different annealing conditions, and the structural evolution following thermal treatments was investigated by means of X-ray diffraction, Raman, and NMR spectroscopies. Besides this, the electronic structure and emission properties were investigated by density functional theory simulations. The intense optical emission and high stability make PhVPI an intriguing material for applications related to light-emitting devices.
引用
收藏
页码：5456 / 5462
页数：7
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