Spectral properties and NIR photoluminescence of Bi+ impurity in CsCdCl3 ternary chloride

NIR photoluminescence of bismuth-doped CsCdBr3 – The first ternary bromide phase with a univalent bismuth impurity center

“…It was shown that several of such subvalent bismuth forms (Bi + [4][5][6][7][8][9][10][11], Bi 5 3+ [12][13][14][15][16], Bi 2 8+ [16]) demonstrate the broadband NIR PL.…”

“…Univalent bismuth impurity, observed in several chloride [6][7][8][9][10], iodide [18,19] and nonhalide crystal phases [11,[20][21][22][23][24][25], represents the simplest form of NIR photoluminescent subvalent bismuth center. It possesses the 6p 2 open shell electronic configuration with the 3 P 0 ground state and 3 P 1 , 3 P 2 low lying excited states.…”

Influence of monovalent Bi+ doping on real composition, point defects, and photoluminescence in TlCdCl3 and TlCdI3 single crystals

“…The unit cell parameters of TlCdI 3 :Bi single crystals, determined by both XRD and SCXRD analyses (Table 1), are smaller than those found for the undoped TlCdI 3 crystals [30]. It follows that the Tl + ions (r Tl VIII = 1.59 Å [31]; r is a cation radius) are not replaced by the Bi + ones (r Bi VIII = 1.774 Å [12]), as was supposed [17,[32][33][34][35][36][37][38]. The refinement of the Tl site occupancy showed its decrease, which also evidences an absence of the Bi + ions in this site (the form factor or atomic factor is proportional to the atomic number), but indicates the presence of vacancies ( Table 1).…”

Near infrared photoluminescence of the univalent bismuth impurity center in leucite and pollucite crystal hosts

“…[29][30][31][32][33] It is interesting that NIR luminescence has also been detected from the bismuth dimer anion (Bi 2 2À ) in the (K-crypt) 2 Bi 2 crystal phase. 34 It was also demonstrated that the univalent bismuth cation (Bi + ) is the NIR emitter in the ternary halide crystals KAlCl 4 , KMgCl 3 , RbPb 2 Cl 5 , and CsCdCl 3 , 14,17,18,35,36 where Bi + substitutes isomorphically for the large alkali cations. On the other hand, it seems that several different emitters contribute to the net NIR photoluminescence in Bi-doped SiO 2 and GeO 2 -based glasses.…”

“…The spectra of NIR photoluminescence, luminescence excitation and 2D excitation-emission spectra along with photoluminescence kinetic characteristics were obtained at room temperature as described earlier. 17,18,35,36 Several CW diode and DPSS lasers with wavelengths of 405 nm, 470 nm, 532 nm, 635 nm, 660 nm and 690 nm and 20-200 mW output power were employed to excite the photoluminescence.…”