This study presents a combined experimental and theoretical study of the electronic structure of two 2D metal halide perovskite films. Ultraviolet and inverse photoemission spectroscopies are performed on solution-processed thin films of the n = 1 layered perovskite butylammonium lead iodide and bromide,...
The lower tolerance factor with absorption wavelength at 8260 made the MAPbI3 most popular in perovskite solar cell applications. But a range of stability issues lies in these materials. The combined effect of light, moisture and oxygen can lead to the chemical degradation of MAPbX3 perovskites....
We report on the fabrication and properties of the semiconducting 2D (CH3(CH2)3NH3)2(CH3NH3)(n-1)Pb(n)I(3n+1) (n = 1, 2, 3, and 4) perovskite thin films. The band gaps of the series decrease with increasing n values, from 2.24 eV (CH3(CH2)3NH3)2PbI4 (n = 1) to 1.52...
For n = 1, a pure 2D perovskite structure of type (RNH3)2MX4 can be achieved and for n = ∞, a close to 3D perovskite structure can be achieved. Thus RP perovskites demonstrate optoelectronic properties which comprise of wide range of properties from 2 to 3D perovskites1,18,...
Fig. 1: Diffraction from 2D/3D perovskite structures. aIllustration of a 2D/3D interface for consecutive layers of 3D,n = 2, andn = 1 RDPs.bSchematic of the in situ GIWAXS experimental system used herein. A solvent dripper is positioned directly above the sample, which is mounte...
最终,CsPbIxBr3-x全无机器件获得了显著的效率提升,光电转换效率13.64%提升到18%,器件寿命也大大延长。结果相关结果以“High‐Performance CsPbIxBr3‐x All‐Inorganic Perovskite Solar Cells with Efficiency over 18% via Spontaneous Interfacial Manipulation”为题发表在Adv. Funct. Mater.期刊上。
The adoption of three-dimensional (3D) integration has revolutionized NAND flash memory technology, and a similar transformative potential exists for logic circuits, by stacking transistors into the third dimension. This pivotal shift towards 3D integrat
近日,陕西师范大学刘生忠教授和赵奎教授(通讯作者)等人在Nano Letters报道了2D/3D钙钛矿电池的重要进展,文章题目为“Interfacial engineering at the 2D/3D heterojunction for high-performance perovskite solar cells”。该研究发现,在2D/3D层状异质结中,表层量子阱的成核和生长过程受到底层3D钙钛矿的诱导作用,从而促进...
Here, prototype filterless bandpass photodetectors with near square‐shape photoresponse are developed based on (CmH2m 1NH3)2PbI4/MAPbI3 (m = 4–8) and (CmH2m 1NH3)2PbBr4/MAPbBr3 (m = 2–8) perovskite heterojunctions. The strong and sharp excitonic absorption of 2D perovskites defines ...
26. The deposition results in the formation of a low-dimensional perovskite possibly arranging into a (HOOC(CH2)4NH3)2PbI4structure. A yellowish film containing needle-like crystallites is formed (Supplementary Fig. 1). As shown inFig. 1a, the absorption spectra of the film shows a clear ...