A new silicon phosphide, Si12P5 : Formation conditions, structure, and properties

The formation conditions, structure, and properties of the recently discovered phosphide, Si12P5 (initially assigned Si7P3), have been studied using x-ray diffraction, high-resolution transmission electron microscopy, photospectrometry, and a four-point probe. The phosphide formed in amorphous Si-P alloy thin films with 30, 35 and 44 at. % P after annealing at 1000°C for 30 min. During annealing at 1100°C, the phosphide dissociated through P evaporation. The Si12P5 phase is proposed to have rhombohedral symmetry with a P31m space group and a C5W12 structure. The hexagonal lattice parameters measured were a = 6.16±0.05 Å and c = 13.17±0.01 Å. The optical band gap and the electrical resistivity of the phosphide were determined to be 1.55 eV and 5 mΩ cm, respectively. The Gibbs free energy diagram for the Si-P system was modified to include this new Si12P5 phase.

Madsen, LDLinköping University (författare)
Johansson, MPLinköping University (författare)
Hultman, LLinköping University (författare)
Li, XHLinköping University (författare)
Hentzell, HTGLinköping University (författare)
Wallenberg, LRLund University,Lunds universitet,Centrum för analys och syntes,Kemiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Centre for Analysis and Synthesis,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)ook2-rwa (författare)
Linköping UniversityCentrum för analys och syntes (creator_code:org_t)

Ingår i:Journal of Vacuum Science and Technology A: American Vacuum Society15:2, s. 394-4010734-2101
Ingår i:Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films: American Vacuum Society15:2, s. 394-4011520-8559

Av författaren/redakt...: Carlsson, JRA; Madsen, LD; Johansson, MP; Hultman, L; Li, XH; Hentzell, HTG; visa fler...; Wallenberg, LR; visa färre...

Om ämnet

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.