TY - JOUR
T1 - Photoluminescence studies of p-type chalcopyrite AgInS2:Sn
AU - Albor Aguilera, M. L.
AU - Aguilar Hernández, J. R.
AU - González Trujillo, M. A.
AU - Ortega Lopez, M.
PY - 2007/9/22
Y1 - 2007/9/22
N2 - Chalcopyrite AgInS2:Sn thin films were prepared by spray pyrolysis technique for a constant ratio of [Ag]/[In]=1.5 and different SnCl4 concentrations (0.05, 0.1 and 0.2 ml) in the spray solution obtaining x=[SnCl4]/[Ag]+[In]=0.01, 0.02, 0.04. All films were deposited at substrate temperature of 375 °C. The deposited film for which x=0.02 exhibited p-type conductivity, having band-gap energies of 1.87 and 2.01 eV. Photoluminescence (PL) studies reveal several PL bands located at 1.45, 1.68, 1.70, 1.80 and ∼1.88 eV at 10 K. Each one of these PL structures are related to different defects, the 1.45 eV emission is related to indium vacancies, 1.80 eV emission to interstitial silver (Agin) or Indium in sites of silver (AgIn), whereas, the other emissions (1.70 and 1.88 eV) are related with a donor-acceptor pair recombination and free to bound transition, respectively, due to sulphur vacancies. Sn in excess modifies the emission bands located at 1.70 and 1.88 eV; we found that Sn reduces sulphur vacancies and PL spectra are dominated by acceptor impurities.
AB - Chalcopyrite AgInS2:Sn thin films were prepared by spray pyrolysis technique for a constant ratio of [Ag]/[In]=1.5 and different SnCl4 concentrations (0.05, 0.1 and 0.2 ml) in the spray solution obtaining x=[SnCl4]/[Ag]+[In]=0.01, 0.02, 0.04. All films were deposited at substrate temperature of 375 °C. The deposited film for which x=0.02 exhibited p-type conductivity, having band-gap energies of 1.87 and 2.01 eV. Photoluminescence (PL) studies reveal several PL bands located at 1.45, 1.68, 1.70, 1.80 and ∼1.88 eV at 10 K. Each one of these PL structures are related to different defects, the 1.45 eV emission is related to indium vacancies, 1.80 eV emission to interstitial silver (Agin) or Indium in sites of silver (AgIn), whereas, the other emissions (1.70 and 1.88 eV) are related with a donor-acceptor pair recombination and free to bound transition, respectively, due to sulphur vacancies. Sn in excess modifies the emission bands located at 1.70 and 1.88 eV; we found that Sn reduces sulphur vacancies and PL spectra are dominated by acceptor impurities.
KW - AgInS:Sn
KW - Photoluminescense
KW - Spray pyrolysis
UR - http://www.scopus.com/inward/record.url?scp=34447255694&partnerID=8YFLogxK
U2 - 10.1016/j.solmat.2007.05.006
DO - 10.1016/j.solmat.2007.05.006
M3 - Artículo
SN - 0927-0248
VL - 91
SP - 1483
EP - 1487
JO - Solar Energy Materials and Solar Cells
JF - Solar Energy Materials and Solar Cells
IS - 15-16
ER -