论文信息 - Absorption and Luminescence in Ultra-Thin Films of PbI2

Absorption and Luminescence in Ultra-Thin Films of PbI2

We have measured the absorption and luminescence spectra of the ultra-thin PbI 2 film evaporated on a cleaved KCl crystal at 100 K. The energy of the exciton absorption band is analyzed by the one-dimensional quantum well, but the exciton energies in the platelet crystals consisting of the two and three layers deviate from the simple theoretical values because of the too thin crystals. From the appearance of the broad luminescence band in the ultra-thin film, it is concluded that the free exciton level may become higher than that of the self-trapped exciton by the quantum well effect.

T. Goto | J. Maeda

[1] T. Hayashi. Interference of exciton polaritons in PbI2 thin platelets , 1986 .

[2] Chung,et al. Carrier confinement and special crystallite dimensions in layered semiconductor colloids. , 1986, Physical review. B, Condensed matter.

[3] Warnock,et al. Quantum size effects in simple colored glass. , 1985, Physical review. B, Condensed matter.

[4] T. Ishihara,et al. Low energy tail of the exciton luminescence band in 2H-PbI2 and its relation to Urbach rule , 1985 .

[5] T. Goto,et al. Absorption Due to Quasi-Two-Dimensional Electronic Transition in Very Thin Films of PbI2 , 1984 .

[6] N. Nagasawa,et al. Anomalous wave interference at Z3-exciton resonance of CuCl , 1982 .

[7] M. Schreiber,et al. Numerical Experiments on the Absorption Lineshape of the Exciton under Lattice Vibrations.III.The Urbach Rule , 1982 .

[8] D. Fröhlich,et al. Two-photon absorption in PbI2 , 1977 .

[9] C. Depeursinge,et al. The band gap excitons in PbI2 , 1975 .

[10] C. Gähwiller,et al. Excitonic Effects in the Electroreflectance of Lead Iodide , 1969 .