Browsing Gas Processing Center by Author "Pullerits, Tõnu"
Now showing items 1-6 of 6
-
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 ... -
Enhanced Size Selection in Two-Photon Excitation for CsPbBr3 Perovskite Nanocrystals
Chen, Junsheng; Chábera, Pavel; Pascher, Torbjörn; Messing, Maria E.; Schaller, Richard; Canton, Sophie; Zheng, Kaibo; Pullerits, Tõnu... more authors ... less authors ( American Chemical Society , 2017 , Article)Cesium lead bromide (CsPbBr3) perovskite nanocrystals (NCs), with large two-photon absorption (TPA) cross-section and bright photoluminescence (PL), have been demonstrated as stable two-photon-pumped lasing medium. With ... -
Hot electron and hole dynamics in thiol-capped CdSe quantum dots revealed by 2D electronic spectroscopy
Lenngren, Nils; Abdellah, Mohamed A.; Zheng, Kaibo; Al-Marri, Mohammed J.; Zigmantas, Donatas; Žídek, Karel; Pullerits, Tõnu... more authors ... less authors ( Royal Society of Chemistry , 2016 , Article)Colloidal quantum dots (QDs) have attracted interest as materials for opto-electronic applications, wherein their efficient energy use requires the understanding of carrier relaxation. In QDs capped by bifunctional thiols, ... -
Insights into charge carrier dynamics in organo-metal halide perovskites: From neat films to solar cells
Peng, Jiajun; Chen, Yani; Zheng, Kaibo; Pullerits, Tõnu; Liang, Ziqi ( Royal Society of Chemistry , 2017 , Article Review)Organo-metal halide perovskites have recently obtained world-wide attention as promising solar cell materials. They have broad and strong light absorption along with excellent carrier transport properties which partially ... -
Tailoring Organic Cation of 2D Air-Stable Organometal Halide Perovskites for Highly Efficient Planar Solar Cells
Chen, Yani; Sun, Yong; Peng, Jiajun; Zhang, Wei; Su, Xiaojun; Zheng, Kaibo; Pullerits, Tõnu; Liang, Ziqi... more authors ... less authors ( Wiley-VCH Verlag , 2017 , Article)2D perovskites have recently been shown to exhibit significantly improved environmental stability. Derived from their 3D analogues, 2D perovskites are formed by inserting bulky alkylammonium cations in‐between the anionic ... -
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 ...