Temperature dependence of the pyro- and photoelectric response in Sn/sub 2/P/sub 2/S/sub 6/ films

Nonstationary photocurrent and pyroelectric response in aged Sn2P2S6 films

“…For single crystal samples the pyroelectric current maximum is observed at 66 • C. However, in virgin films the pyroelectric response maximum shifts down to T m ≈ 55 • C. 2 So the further shift to T m ≈ 30 • C (Fig. 2) is due to the process of ageing.…”

“…The temperature dependence of NSPC is plotted for amplitude values of the photoelectric response. It is essential to note a shift of the maximum toward lower temperatures after ageing; before ageing it was observed at 60 • C. 2 Earlier, such a strong displacement of the NSPC maximum was noticed after polarizing of the virgin Sn 2 P 2 S 6 films in a direction opposite to that of natural polarity.…”

“…1 Earlier, we reported on the transient photocurrents arising in Sn 2 P 2 S 6 films under extrinsic and intrinsic light excitation (hν ≥ E g and hν < E g , E g = 2.4 eV, bandgap energy). [2][3][4] It was demonstrated that illumination of Sn 2 P 2 S 6 films in the absence of an external electric field is accompanied by a turn-on transient current pulse with relaxation. The same effect is observed for the pyroelectric response.…”

New Layered Tin(II) Thiophosphates ASnPS4 (A = K, Rb, Cs): Synthesis, Structure, Glass Formation, and the Modulated CsSnPS4

“…Tin can bind to various thiophosphate anions like [PS 4 ] 3– , [P 2 S 7 ] 4– , [P 2 S 9 ] 2– , [P 2 S 6 ] 2– , [P 2 S 6 ] 4– , and so forth. Both divalent and tetravalent tin thiophosphates such as Sn 2 P 2 S 6 , , SnP 2 S 6 , Sn 2 P 2 S 8 are well-known for their interesting properties. Although there exists a great number of tetravalent tin thiophosphates in the literature, examples of quaternary divalent tin thiophosphate compounds are rare. − We report here the synthesis, structure, characterization, and glass formation properties of alkali metal salts of a new family of quaternary divalent tin thiophosphates, ASnPS 4 [A = K( 1) , Rb ( 2 ), and the modulated Cs ( 3 )].…”

“…43 Tin can bind to various thiophos-phate anions like [PS 4 ] 3− , [P 2 S 7 ] 4− , [P 2 S 9 ] 2− , 20 [P 2 S 6 ] 2− , 21 [P 2 S 6 ] 4−52 , and so forth. Both divalent and tetravalent tin thiophosphates such as Sn 2 P 2 S 6 , 53,54 SnP 2 S 6 , 55 Sn 2 P 2 S 8 56 are well-known for their interesting properties. Although there exists a great number of tetravalent tin thiophosphates in the literature, examples of quaternary divalent tin thiophosphate compounds are rare.…”