تصفح حسب المؤلف "Chen, Junsheng"
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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 ... -
Inter-phase charge and energy transfer in Ruddlesden-Popper 2D perovskites: Critical role of the spacing cations
Zheng, Kaibo; Chen, Yani; Sun, Yong; Chen, Junsheng; Chábera, Pavel; Schaller, Richard; Al-Marri, Mohammed J.; Canton, Sophie E.; Liang, Ziqi; Pullerits, Tõnu... more authors ... less authors ( Royal Society of Chemistry , 2018 , Article)Photo-generated charge carrier dynamics in Ruddlesden-Popper 2D perovskites with linear (n-BA) and branched (iso-BA) butylamine as spacing cations have been studied by using transient absorption and time-resolved ... -
Photostability of the Oleic Acid-Encapsulated Water-Soluble CdxSeyZn1-xS1-y Gradient Core-Shell Quantum Dots
Chen, Junsheng; Yang, Bin; Li, Chuanshuai; Zheng, Kaibo; Zidek, Karel; Pullerits, Tonu... more authors ... less authors ( American Chemical Society , 2017 , Article)Composite systems where quantum dots (QDs) are combined with other nanomaterials (e.g., gold nanorods) in aqueous solutions have attracted broad attention - both for their potential in applications and for studies of ... -
Size-And Wavelength-Dependent Two-Photon Absorption Cross-Section of CsPbBr3 Perovskite Quantum Dots
Chen, Junsheng; Zidek, Karel; Chabera, Pavel; Liu, Dongzhou; Cheng, Pengfei; Nuuttila, Lauri; Al-Marri, Mohammed J.; Lehtivuori, Heli; Messing, Maria E.; Han, Keli; Zheng, Kaibo; Pullerits, Tonu... more authors ... less authors ( American Chemical Society , 2017 , Article)All-inorganic colloidal perovskite quantum dots (QDs) based on cesium, lead, and halide have recently emerged as promising light emitting materials. CsPbBr3 QDs have also been demonstrated as stable two-photon-pumped lasing ... -
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 ...