294 citations · 976 across the 19 of their papers we have counts for
19 papers
Possible Origin of Preformed Hole Pairs and Superconductivity in Cuprates
Shu Wang, Joel W. Ager, Wladek Walukiewicz
This paper addresses the long standing and controversial issue of the origin of superconductivity in cuprates. Their superconductivity can be attributed to amphoteric defects assoc…
The Bright Side and the Dark Side of Hybrid Organic Inorganic Perovskites
Wladek Walukiewicz, Shu Wang, Xinchun Wu +6
The previously developed bistable amphoteric native defect (BAND) model is used for a comprehensive explanation of the unique photophysical properties and for understanding the rem…
Chemical trends of deep levels in van der Waals semiconductors
Penghong Ci, Xuezeng Tian, Jun Kang +11
Properties of semiconductors are largely defined by crystal imperfections including native defects. Van der Waals (vdW) semiconductors, a newly emerged class of materials, are no e…
Bistable Amphoteric Native Defect Model of Perovskite Photovoltaics
W. Walukiewicz, I. Rey-Stolle, G. Han +6
The past few years have witnessed unprecedented rapid improvement of the performance of a new class of photovoltaics based on halide perovskites. This progress has been achieved ev…
THz Transient Photoconductivity of the III-V Dilute Nitride GaPAsN
J. N. Heyman, E. M. Weiss, J. R. Rollag +5
THz Time-Resolved Photoconductivity is used to probe carrier dynamics in the dilute III-V nitride GaP0.49As0.47N0.036. In these measurements a femtosecond optical pump-pulse excite…
Carrier Lifetimes in a III-V-N Intermediate Band Semiconductor
J. N. Heyman, A. M. Schwartzberg, K. M. Yu +5
We have used transient absorption spectroscopy to measure carrier lifetimes in the multiband band semiconductor GaPAsN. These measurements probe the electron populations in the con…