TY - JOUR
T1 - Carrier separation at dislocation pairs in CdTe
AU - Li, Chen
AU - Wu, Yelong
AU - Pennycook, Timothy J.
AU - Lupini, Andrew R.
AU - Leonard, Donovan N.
AU - Yin, Wanjian
AU - Paudel, Naba
AU - Al-Jassim, Mowafak
AU - Yan, Yanfa
AU - Pennycook, Stephen J.
PY - 2013/8/29
Y1 - 2013/8/29
N2 - Through the use of aberration corrected scanning transmission electron microscopy, the atomic configuration of CdTe intragrain Shockley partial dislocation pairs has been determined: Single Cd and Te columns are present at opposite ends of both intrinsic and extrinsic stacking faults. These columns have threefold and fivefold coordination, indicating the presence of dangling bonds. Counterintuitively, density-functional theory calculations show that these dislocation cores do not act as recombination centers; instead, they lead to local band bending that separates electrons and holes and reduces undesirable carrier recombination.
AB - Through the use of aberration corrected scanning transmission electron microscopy, the atomic configuration of CdTe intragrain Shockley partial dislocation pairs has been determined: Single Cd and Te columns are present at opposite ends of both intrinsic and extrinsic stacking faults. These columns have threefold and fivefold coordination, indicating the presence of dangling bonds. Counterintuitively, density-functional theory calculations show that these dislocation cores do not act as recombination centers; instead, they lead to local band bending that separates electrons and holes and reduces undesirable carrier recombination.
UR - http://www.scopus.com/inward/record.url?scp=84884250809&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.111.096403
DO - 10.1103/PhysRevLett.111.096403
M3 - Article
AN - SCOPUS:84884250809
SN - 0031-9007
VL - 111
JO - Physical Review Letters
JF - Physical Review Letters
IS - 9
M1 - 096403
ER -