Low Energy Tail of the Exciton Luminescence Band in 2H-Pbi2 and its Relation To Urbach Rule. Solid State Commun. 1985, 56, 101-103.Takeda, J., Ishihara, T., Goto, T., 1985. Low-energy tail of the exciton luminescence band in 2H-PbI2 and its relation to Urbach rule. Solid State ...
C、依据PbI2(s)?Pb2++2I-;温度不变,T时刻,向PbI2饱和溶液中加入少量KI浓溶液,平衡左移,平衡后溶液中碘离子浓度增大,铅离子浓度减小;D、先根据用0.0025mol/LNaOH溶液滴定,当达到滴定终点时,用去氢氧化钠溶液20.00mL,测得氢离子物质的量为5×10-5mol,依据Pb2+(aq)+2R-H(s)=R2Pb(s)+2H+(aq),计算...
(4)PbI2:可用于人工降雨。取一定量的PbI2固体,用蒸馏水配制成t℃饱和溶液,准确移取25.00mLPbI2饱和溶液分次加入阳离子交换树脂RH+(发生:2RH++PbI2=R2Pb+2H++2I-),用250ml洁净的锥形瓶接收流出液,最后用蒸馏水淋洗树脂至流出液呈中性,将洗涤液一并盛放到锥形瓶中(如图)。加入酚酞指示剂,用0.0025mol·L-1...
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optical spectraImaginary and real parts of the dielectric function of the layer semiconductor PbI2 were found using the result of the pseudopotential method zone structure of electron energy spectra calculations. This enabled to calculate optical parameters of the crystal, in particular, absorption, and...
Pbi2LuminescenceLineshapeThe pressure dependence of the Raman and luminescence spectra of 2H-PbI2 has been studied under hydrostatic pressure up to 1.5 GPa at 77 K by using a diamond-anvil cell. A structural phase transition occurs at a pressure of P-PT = 0.56 +/- 0.01 Gpa. From the ...
density functional theory calculationsBorn charge tensorsSymmetry properties of the optical phonons of the 2H-PbI2 crystal are analysed. Born charges and the dynamical matrix are calculated the Brillouin zone center. Raman spectra and Phonon dispersion have been compared with experimental results. ...
A procedure is described which allows to prepare optical faces parallel to the c -axis by processing bulk 2H-PbI2 crystals grown from the melt. Its effectiveness is checked by a simultaneous investigation of the reflection and photoluminescence spectra, whose main features compare well to former ...
Palosz, B. Wruck, In situ observation of the polytypic phase transition 2H-12R in PbI2: investigations of the thermodynamic, structural and dielectric properties, Journal of Physics C: Solid State Physics, Vol.20, 1987, pp. 4077-4096.
Palosz, B. Wruck, In situ observation of the polytypic phase transition 2H-12R in PbI2: investigations of the thermodynamic, structural and dielectric properties, J. Phys. C: Solid State Phys. 20 (1987) 4077-4096.Salje E, Palosz B, Wruck B (1987) Polytypism and equilibrium phase ...