Browsing GPC Research by Author "Abdellah, Mohamed"
Now showing items 1-7 of 7
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Correlating structure and electronic band-edge properties in organolead halide perovskites nanoparticles
Zhu, Qiushi; Zheng, Kaibo; Abdellah, Mohamed; Generalov, Alexander; Haase, D�rthe; Carlson, Stefan; Niu, Yuran; Heimdal, Jimmy; Engdahl, Anders; Messing, Maria E.; Pullerits, Tonu; Canton, Sophie E.... more authors ... less authors ( Royal Society of Chemistry , 2016 , Article)After having emerged as primary contenders in the race for highly efficient optoelectronics materials, organolead halide perovskites (OHLP) are now being investigated in the nanoscale regime as promising building blocks ... -
Direct Experimental Evidence for Photoinduced Strong-Coupling Polarons in Organolead Halide Perovskite Nanoparticles
Zheng, Kaibo; Abdellah, Mohamed; Zhu, Qiushi; Kong, Qingyu; Jennings, Guy; Kurtz, Charles A.; Messing, Maria E.; Niu, Yuran; Gosztola, David J.; Al-Marri, Mohammed J.; Zhang, Xiaoyi; Pullerits, Tonu; Canton, Sophie E.... more authors ... less authors ( American Chemical Society , 2016 , Article)Echoing the roaring success of their bulk counterparts, nano-objects built from organolead halide perovskites (OLHP) present bright prospects for surpassing the performances of their conventional organic and inorganic ... -
Drastic difference between hole and electron injection through the gradient shell of Cd: XSeyZn1- xS1- y quantum dots
Abdellah, Mohamed; Poulsen, Felipe; Zhu, Qiushi; Zhu, Nan; Žídek, Karel; Chábera, Pavel; Corti, Annamaria; Hansen, Thorsten; Chi, Qijin; Canton, Sophie E.; Zheng, Kaibo; Pullerits, Tõnu... more authors ... less authors ( Royal Society of Chemistry , 2017 , Article)Ultrafast fluorescence spectroscopy was used to investigate the hole injection in CdxSeyZn1−xS1−y gradient core–shell quantum dot (CSQD) sensitized p-type NiO photocathodes. A series of CSQDs with a wide range of shell ... -
High Excitation Intensity Opens a New Trapping Channel in Organic-Inorganic Hybrid Perovskite Nanoparticles
Zheng, Kaibo; Zidek, Karel; Abdellah, Mohamed; Chen, JunSheng; Chabera, Pavel; Zhang, Wei; Al-Marri, Mohammed J.; Pullerits, Tonu... more authors ... less authors ( American Chemical Society , 2016 , Article)We investigated the excited-state dynamics of CH3NH3PbBr3 perovskite nanoparticles (NPs) and bulk crystals under various excitation intensity regimes using transient absorption spectroscopy. We confirmed the sub-band gap ... -
Surface plasmon inhibited photo-luminescence activation in CdSe/ZnS core-shell quantum dots
Chen, Junsheng; Zidek, Karel; Abdellah, Mohamed; Al-Marri, Mohammed J; Zheng, Kaibo; Pullerits, TOnu... more authors ... less authors ( Institute of Physics Publishing , 2016 , Article)In a composite film of Cdx Sey Zn1-x S1-y gradient core-shell quantum dots (QDs) and gold nanorods (NRs), the optical properties of the QDs are drastically affected by the plasmonic nanoparticles. We provide a careful study ... -
Time-resolved terahertz spectroscopy reveals the influence of charged sensitizing quantum dots on the electron dynamics in ZnO
N., Sesha Bamini; Němec, Hynek; Žídek, Karel; Abdellah, Mohamed; Al-Marri, Mohammed J.; Chábera, Pavel; Ponseca, Carlito; Zheng, Kaibo; Pullerits, Tönu... more authors ... less authors ( Royal Society of Chemistry , 2017 , Article)Photoinitiated charge carrier dynamics in ZnO nanoparticles sensitized by CdSe quantum dots is studied using transient absorption spectroscopy and time-resolved terahertz spectroscopy. The evolution of the transient spectra ... -
Trap States and Their Dynamics in Organometal Halide Perovskite Nanoparticles and Bulk Crystals
Zheng, Kaibo; Žídek, Karel; Abdellah, Mohamed; Messing, Maria E.; Al-Marri, Mohammed J.; Pullerits, Tõnu... more authors ... less authors ( American Chemical Society , 2016 , Article)Organometal halide perovskites have attracted tremendous attention for optoelectronic applications. Charge carrier trapping is one of the dominant processes often deteriorating the performance of devices. Here, we investigate ...