TY - JOUR
T1 - Negatively charged donor centers in ultrathin ZnSe:N layers
AU - Strauf, S.
AU - Michler, P.
AU - Gutowski, J.
AU - Klude, M.
AU - Hommel, D.
AU - Wolverson, D.
AU - Davies, J. J.
PY - 2002
Y1 - 2002
N2 - Pseudomorphically grown p-ZnSe:N layers being as thin as 100, 20, 10 and 5 nm embedded in ZnMgSSe barriers were investigated by means of photoluminescence and spin-flip-Raman (SFR) scattering spectroscopy. A new donor-acceptor-pair (DAP) band has been observed involving a very shallow donor with a binding energy of (19 ± 2) meV and the well-known N acceptor on Se site. Further evidence for a new donor center is given by transitions in angle-dependent SFR scattering measurements which correspond to an isotropic (donor-like) g-value of (1.49 ± 0.03). The 19 meV donor is interpreted as the negatively charged state of the usually found 52 meV deep donor in ZnSe:N. This is supported by the temperature behavior of the DAP band and, further, by its pronounced appearance for resonant excitation into the barriers quite similar to the behavior of trions.
AB - Pseudomorphically grown p-ZnSe:N layers being as thin as 100, 20, 10 and 5 nm embedded in ZnMgSSe barriers were investigated by means of photoluminescence and spin-flip-Raman (SFR) scattering spectroscopy. A new donor-acceptor-pair (DAP) band has been observed involving a very shallow donor with a binding energy of (19 ± 2) meV and the well-known N acceptor on Se site. Further evidence for a new donor center is given by transitions in angle-dependent SFR scattering measurements which correspond to an isotropic (donor-like) g-value of (1.49 ± 0.03). The 19 meV donor is interpreted as the negatively charged state of the usually found 52 meV deep donor in ZnSe:N. This is supported by the temperature behavior of the DAP band and, further, by its pronounced appearance for resonant excitation into the barriers quite similar to the behavior of trions.
UR - http://www.scopus.com/inward/record.url?scp=0035995522&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0035995522&partnerID=8YFLogxK
U2 - 10.1002/1521-3951(200201)229:1<245::AID-PSSB245>3.0.CO;2-S
DO - 10.1002/1521-3951(200201)229:1<245::AID-PSSB245>3.0.CO;2-S
M3 - Article
AN - SCOPUS:0035995522
SN - 0370-1972
VL - 229
SP - 245
EP - 250
JO - Physica Status Solidi (B) Basic Research
JF - Physica Status Solidi (B) Basic Research
IS - 1
ER -