Structure-Dependent Photoluminescence in Low-Dimensional Ethylammonium, Propylammonium, and Butylammonium Lead Iodide Perovskites

Lin，Chang Wei1; Liu，Fangzhou2; Chen，Ting Yang1; Lee，Kuan Hua1; Chang，Chung Kai3; He，Yanling2,4; Leung，Tik Lun4; Ng，Alan Man Ching4; Hsu，Chia Hung1,3; Popović，Jasminka5; Djurišić，Aleksandra2; Ahn，Hyeyoung1

2020

10.1021/acsami.9b17881

ACS Applied Materials & Interfaces   影响因子和分区

1944-8244

1944-8252

Hybrid organic-inorganic perovskites have attracted great attention as the next generation materials for photovoltaic and light-emitting devices. However, their environment instability issue remains as the largest challenge for practical applications. Recently emerging two-dimensional (2D) perovskites with Ruddlesden-Popper structures are found to greatly improve the stability and aging problems. Furthermore, strong confinement of excitons in these natural quantum-well structures results in the distinct and narrow light emission in the visible spectral range, enabling the development of spectrally tunable light sources. Besides the strong quasi-monochromatic emission, some 2D perovskites composed of the specific organic cations and inorganic layer structures emit a pronounced broadband emission. Herein, we report the light-emitting properties and the degradation of low-dimensional perovskites consisting of the three shortest alkylammonium spacers, mono-ethylammonium (EA), n-propylammonium (PA), and n-butylammonium (BA). While (BA)PbI is known to form well-oriented 2D thin films consisting of layers of corner-sharing PbI octahedra separated by a bilayer of BA cations, EA with shorter alkyl chains tends to form other types of lower-dimensional structures. Nevertheless, optical absorption edges of as-prepared fresh EAPbI, (PA)PbI, and (BA)PbI are obviously blue-shifted to 2.4-2.5 eV compared to their 3D counterpart, methylammonium lead iodide (MAPbI) perovskite, and they all emit narrow excitonic photoluminescence. Furthermore, by carefully optimizing deposition conditions, we have achieved a predominantly 2D structure for (PA)PbI. However, unlike (BA)PbI, upon exposure to ambient environment, (PA)PbI readily transforms to a different crystal structure, exhibiting a prominently broadband light from ∼500 to 800 nm and a gradual increase in intensity as structural transformation proceeds.

alkylammonium broadband emission excitonic emission hybrid lead halide perovskites two-dimensional materials

SCI ; EI

英语

其他

[JCYJ20170818141216288] ; University of Hong Kong[] ; [5037/18G] ; Ministerio de Ciencia y Tecnología[MOST 107-2923-M-009-003-MY3]

Science & Technology - Other Topics ; Materials Science

Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary

WOS:000510532000088

American Chemical Society

20200408083786

Blue shift ; Computerized tomography ; Crystal structure ; Crystallography ; Iodine compounds ; Layered semiconductors ; Light absorption ; Light sources ; organic-inorganic materials ; Perovskite ; Photoluminescence ; Positive ions ; Semiconductor quantum wells

Minerals:482.2 ; Semiconductor Devices and Integrated Circuits:714.2 ; Computer Applications:723.5 ; Light/Optics:741.1 ; Crystalline Solids:933.1 ; Crystal Lattice:933.1.1

2-s2.0-85078158818

Scopus

1.Department of Photonics,College of Electrical and Computer Engineering,National Chiao Tung University,Hsinchu,30010,Taiwan
2.Department of Physics,University of Hong Kong,Hong Kong,Pokfulam Road,999077,Hong Kong
3.National Synchrotron Radiation Research Center,Hsinchu,30076,Taiwan
4.Department of Physics,Southern University of Science and Technology,Shenzhen, Guangdong,No. 1088, Xueyuan Road,518055,China
5.Center of Excellence for Advanced Materials and Sensing Devices,Division for Materials Physics,Laboratory for Synthesis and Crystallography of Functional Materials,Ruder Bošković Institute,Zagreb,Bijenička 54,52210,Croatia

Lin，Chang Wei,Liu，Fangzhou,Chen，Ting Yang,et al. Structure-Dependent Photoluminescence in Low-Dimensional Ethylammonium, Propylammonium, and Butylammonium Lead Iodide Perovskites[J]. ACS Applied Materials & Interfaces,2020,12(4):5008-5016.

Lin，Chang Wei.,Liu，Fangzhou.,Chen，Ting Yang.,Lee，Kuan Hua.,Chang，Chung Kai.,...&Ahn，Hyeyoung.(2020).Structure-Dependent Photoluminescence in Low-Dimensional Ethylammonium, Propylammonium, and Butylammonium Lead Iodide Perovskites.ACS Applied Materials & Interfaces,12(4),5008-5016.

Lin，Chang Wei,et al."Structure-Dependent Photoluminescence in Low-Dimensional Ethylammonium, Propylammonium, and Butylammonium Lead Iodide Perovskites".ACS Applied Materials & Interfaces 12.4(2020):5008-5016.