材料科学
钙钛矿(结构)
带隙
激子
吸收边
晶格常数
半导体
吸收(声学)
光电子学
结合能
二极管
库仑
凝聚态物理
结晶学
光学
原子物理学
物理
衍射
复合材料
电子
化学
量子力学
作者
Naresh Kumar Kumawat,Arun K. Dey,Aravindh Kumar,Sreelekha P. Gopinathan,K. L. Narasimhan,Dinesh Kabra
标识
DOI:10.1021/acsami.5b02159
摘要
We report on the structural, morphological and optical properties of AB(Br(1-x)Cl(x))3 (where, A = CH3NH3(+), B = Pb(2+) and x = 0 to 1) perovskite semiconductor and their successful demonstration in green and blue emissive perovskite light emitting diodes at room temperature. The bandgap of perovskite thin film is tuned from 2.42 to 3.16 eV. The onset of optical absorption is dominated by excitonic effects. The coulomb field of the exciton influences the absorption at the band edge. Hence, it is necessary to explicitly account for the enhancement of the absorption through the Sommerfield factor. This enables us to correctly extract the exciton binding energy and the electronic bandgap. We also show that the lattice constant varies linearly with the fractional chlorine content satisfying Vegards law.
科研通智能强力驱动
Strongly Powered by AbleSci AI