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Total result(s) found: 26
  • ​Single-step colloidal quantum dot films for infrared solar harvesting
    Amirreza Kiani, Brandon R. Sutherland, Younghoon Kim, Olivier Ouellette, Larissa Levina, Grant Walters, Cao-Thang Dinh, Mengxia Liu, Oleksandr Voznyy, Xinzheng Lan, Andre J. Labelle, Alexander H. Ip, Andrew Proppe, Ghada H. Ahmed, Omar F. Mohammed, Sjoerd Hoogland and Edward H. Sargent
    Appl. Phys. Lett. 109, 183105 (2016)
Keywords:
band gap, solar cells, solvents, semiconductors
  • ​Pure crystal orientation and anisotropic charge transport in large-area hybrid perovskite films
    Namchul Cho, Feng Li, Bekir Turedi, Lutfan Sinatra, Smritakshi P. Sarmah, Manas R. Parida, Makhsud I. Saidaminov, Banavoth Murali, Victor M. Burlakov, Alain Goriely, Omar F. Mohammed, Tom Wu & Osman M. Bakr
    Nature Communications 7, Article number: 13407 (2016)
Keywords:
crystal, hybrid perovskite film
  • ​Surface Restructuring of Hybrid Perovskite Crystals
    Banavoth Murali, Sukumar Dey, Ahmed L. Abdelhady, Wei Peng, Erkki Alarousu, Ahmad R. Kirmani, Namchul Cho, Smritakshi Phukan Sarmah, Manas R. Parida, Makhsud I. Saidaminov, Ayan A. Zhumekenov, Jingya Sun, Mohd S. Alias, Emre Yengel, Boon S. Ooi, Aram Amassian, Osman M. Bakr, and Omar F. Mohammed
    ACS Energy Lett., 2016, 1, pp 1119–1126
Keywords:
hybrid perovskite crystals, semiconductor, optoelectronic
  • ​pH-Induced Surface Modification of Atomically Precise Silver Nanoclusters: An Approach for Tunable Optical and Electronic Properties
    Lina G. AbdulHalim, Zahra Hooshmand, Manas R. Parida, Shawkat M. Aly, Duy Le, Xin Zhang, Talat S Rahman, Matthew Pelton, Yaroslav Losovyj, Peter A. Dowben, Osman M. Bakr, Omar F. Mohammed, and Khabiboulakh Katsiev
    Inorg. Chem., 2016, 55 (21), pp 11522–11528
Keywords:
silver nanocluster, spectroscopy
  • ​Pure Cs4PbBr6: Highly Luminescent Zero-Dimensional Perovskite Solids
    Makhsud I. Saidaminov, Jawaher Almutlaq, Smritakshi Phukan Sarmah, Ibrahim Dursun, Ayan A. Zhumekenov, Raihana Begum, Jun Pan, Namchul Cho, Omar F. Mohammed, and Osman M. Bakr
    ACS Energy Lett., Just Accepted Manuscript
Keywords:
perovskites
  • ​Shape-Tunable Charge Carrier Dynamics at the Interfaces between Perovskite Nanocrystals and Molecular Acceptors
    Ghada H. Ahmed, Jiakai Liu, Manas R. Parida, Banavoth Murali, Riya Bose, Noktan M. AlYami, Mohamed N. Hedhili, Wei Peng, Jun Pan, Tabot M. D. Besong, Osman M. Bakr, and Omar F. Mohammed
    J. Phys. Chem. Lett., 2016, 7, pp 3913–3919
Keywords:
perovskite, nanocrystal
  • ​Highly Efficient Perovskite-Quantum-Dot Light-Emitting Diodes by Surface Engineering
    Jun Pan, Li Na Quan, Yongbiao Zhao, Wei Peng, Banavoth Murali, Smritakshi P. Sarmah, Mingjian Yuan, Lutfan Sinatra, Noktan M. Alyami, Jiakai Liu, Emre Yassitepe, Zhenyu Yang, Oleksandr Voznyy, Riccardo Comin, Mohamed N. Hedhili, Omar F. Mohammed, Zheng Hong Lu, Dong Ha Kim, Edward H. Sargent, Osman M. Bakr
    Advanced Materials, (2016)
Keywords:
CsPbBr3;external quantum efficiency;light-emitting diodes;perovskite;quantum dots
  • ​Engineering of CH3NH3PbI3 Perovskite Crystals by Alloying Large Organic Cations for Enhanced Thermal Stability and Transport Properties
    Wei Peng, Xiaohe Miao, Valerio Adinolfi, Erkki Alarousu, Omar El Tall, Abdul-Hamid Emwas, Chao Zhao, Grant Walters, Jiakai Liu, Olivier Ouellette, Jun Pan, Banavoth Murali, Edward H. Sargent, Omar F. Mohammed, Osman M. Bakr
    Angewandte Chemie, 55 (36), pp 10686-10690, (2016)
Keywords:
crystal engineering; organic–inorganic hybrid composites; perovskite phases; photovoltaics
  • ​Porous-Hybrid Polymers as Platforms for Heterogeneous Photochemical Catalysis
    Rana R. Haikal, Xia Wang, Youssef S. Hassan, Manas R Parida, Banavoth Murali, Omar F. Mohammed, Perry J. Pellechia, Marc Fontecave, and Mohamed H. Alkordi
    ACS Appl. Mater. Interfaces, 8 (31), pp 19994–20002, (2016)
Keywords:
Porous-Hybrid Polymers, Photochemical
  • ​Perovskite Nanocrystals as a Color Converter for Visible Light Communication
    Ibrahim Dursun, Chao Shen, Manas R Parida, Jun Pan, Smritakshi P. Sarmah, Davide Priante, Noktan Alyami, Jiakai Liu, Makhsud I. Saidaminov, Mohd S. Alias, Ahmed L. Abdelhady, Tien Khee Ng, Omar F. Mohammed, Boon S. Ooi, and Osman M. Bakr
    ACS Photonics, 3 (7), pp 1150–1156, (2016)
Keywords:
visible light communication, LED, laser diode, perovskite, nanocrystal
  • ​Real-space Mapping of Surface Trap States in CIGSe Nanocrystals using 4D Electron Microscopy
    Riya Bose, Ashok Bera, Manas R Parida, Aniruddha Adhikari, Basamat S. Shaheen, Erkki Alarousu, Jingya Sun, Tom Wu, Osman M. Bakr, Omar F. Mohammed
    Nano Lett., 16 (7), pp 4417–4423, (2016)
Keywords:
solar, optoelectronics, 4D Electron Microscopy, nanocrystal
  • Formamidinium Lead Halide Perovskite Crystals with Unprecedented Long Carrier Dynamics and Diffusion Length
    Ayan A. Zhumekenov, Makhsud I. Saidaminov, Md Azimul Haque, Erkki Alarousu, Smritakshi Phukan Sarmah, Banavoth Murali, Ibrahim Dursun, Xiao-He Miao, Ahmed L. Abdelhady, Tom Wu, Omar F. Mohammed, Osman M. Bakr
    ACS Energy Lett., 2016, 1, pp 32–37
Keywords:
perovskite, crystals
  • Gold Doping of Silver Nanoclusters: A 26-Fold Enhancement in the Luminescence Quantum Yield
    Giada Soldan, Maha A. Aljuhani, Megalamane S. Bootharaju, Lina G. AbdulHalim, Manas R. Parida, Abdul-Hamid Emwas, Omar F. Mohammed, Osman M. Bakr
    Angewandte Chemie, 128, pp 3843-3847, (2016)
Keywords:
Koordinationschemie;Nanocluster;Nanolegierungen;Photolumineszenz;Supramolekulare Chemie
  • ​Remarkably high conversion efficiency of inverted bulk heterojunction solar cells: from ultrafast laser spectroscopy and electron microscopy to device fabrication and optimization
    Q. A. Alsulami, B. Murali, Y. Alsinan, M. R. Parida, S. M. Aly, and O. F. Mohammed
    Advanced Energy Materials, 6 (11), (2016)
Keywords:
bulk heterojunction; grain alignment; high-resolution electron microscopy; interfacial charge transfer; solar cells; laser spectroscopy
  • Real-space Visualization of Energy Loss and Carrier diffusion in Nanowire Array using Four-Dimensional Electron Microscopy
    Riya Bose, Jingya Sun,  Jafar I. Khan, Basamat S. Shaheen, Aniruddha Adhikari, Tien Khee Ng, V. M. Burlakov, Manas R. Parida, Davide Priante, A. Goriely, Boon S. Ooi, Osman M. Bakr, and Omar F. Mohammed
    Advanced Materials, 28 (25), pp 5106-5111, (2016)
Keywords:
Nanowire Array, Four-Dimensional Electron Microscopy
  • Mapping Carrier Dynamics on Material Surfaces in Space and Time using Scanning Ultrafast Electron Microscopy
    Jingya Sun, Aniruddha Adhikari, Basamat S. Shaheen, Haoze Yang, and Omar F. Mohammed
    J. Phys. Chem. Lett., 7(6), pp 985-994, (2016)
Keywords:
Ultrafast Electron Microscopy, Solar Cells, Optoelectronics
  • ​10-fold enhancement in light-driven water splitting using niobium oxynitride microcone array films
    Basamat S. Shaheen, Ahmed M. Hafez, Banavoth Murali, Ahmad R. Kirmani, Aram Amassian, Omar F. Mohammed, Nageh K. Allam
    Solar Energy Materials and Solar Cells, 151, 149-153, (2016)
Keywords:
Oxynitride; Water splitting; Anodization; Photo-electrodes; Microcones
  • ​Solution-Grown Monocrystalline Hybrid Perovskite Films for Hole-Transporter-Free Solar Cells
    Wei Peng, Lingfei Wang, Banavoth Murali, Kang-Ting Ho, Ashok Bera, Namchul Cho, Chen-Fang Kang, Victor M. Burlakov, Jun Pan, Lutfan Sinatra, Chun Ma, Wei Xu, Dong Shi, Erkki Alarousu, Alain Goriely, Jr-Hau He, Omar F. Mohammed, Tom Wu, Osman M. Bakr
    Advanced Materials, 28(17), pp 3383-3390, (2016)
Keywords:
CH3NH3PbBr3; hole-transporter-free solar cells; hybrid perovskites; single crystals
  • ​Robust and Air-Stable Sandwiched Organo-Lead Halide Perovskites for Photodetector Applications
    Banavoth Murali, Makhsud I. Saidaminov, Ahmed L. Abdelhady, Wei Peng, Jiakai Liu, Jun Pan, Osman M. Bakr, Omar F. Mohammed
    J. Mater. Chem. C, 4, pp 2545-2552, (2016)​
Keywords:
Perovskites, Photodetector , Solar Cells, Organo-Lead Halide
  • Enhanced Optoelectronic Performance of a Passivated Nanowire-based Device: Key Information from Real-space Imaging using 4D Electron Microscopy
    Jafar I. Khan, Aniruddha Adhikari, Jingya Sun, Davide Priante, Riya Bose, Basamat S. Shaheen, Tien Khee Ng, Chao Zhao, Osman M. Bakr, Boon S. Ooi, Omar F. Mohammed
    Small, 12(17), pp 2313-2320, (2016)​

Keywords:
4D Ultrafast microscopy, charge carrier dynamics, passivation, InGaN nanowires, carrier recombination
  • ​Ultrathin Cu2O as an efficient inorganic hole transporting material for perovskite solar cells
    Weili Yu, Feng Li, Hong Wang, Erkki Alarousu, Yin Chen, Bin Lin, Lingfei Wang, Mohamed Nejib Hedhili, Yangyang Li, Kewei Wu, Xianbin Wang, Omar F. Mohammed, and Tom Wu
    Nanoscale, 8, pp 6173-6179, (2016)​
Keywords:
perovskite, solar cell, thermal oxidation
  • ​Triplet excited state properties in variable gap π-conjugated donor-acceptor-donor chromophores
    Seda Cekli, Russell W. Winkel, Erkki Alarousu, Omar F. Mohammed, and Kirk S Schanze
    Chem. Sci., 7, 3621-3631, (2016)
Keywords:
triplet excited state properties, variable band-gap, chromophores, electrochemical, photophysical
  • ​Heterovalent dopant incorporation for bandgap and type engineering of perovskite crystals
    Ahmed L. Abdelhady, Makhsud I. Saidaminov, Banavoth Murali, Valerio Adinolfi, Oleksandr Voznyy, Khabiboulakh Katsiev, Erkki Alarousu, Riccardo Comin, Ibrahim Dursun, Lutfan Sinatra, Edward H. Sargent, Omar F. Mohammed, and Osman M. Bakr
    J. Phys. Chem. Lett., 7 (2), pp 295–301, (2016)
Keywords:
perovskite crystal, dopant incorporation, heterovalent
  • Templated atom-precise galvanic synthesis and structure elucidation of a [Ag24Au(SR)18]− nanocluster
    Megalamane S. Bootharaju, Chakra P. Joshi, Manas R. Parida, Omar F. Mohammed, Osman M. Bakr
    Angewandte Chemie Int. Ed., 55(3), pp 922–926, (2016)
Keywords:
Galvanic synthesis, Structure elucidation, Nanocluster
  • The impact of electrostatic interactions on ultrafast charge transfer at Ag29 nanocluster - and CdTe quantum dot-fullerene interfaces
    Ghada H. Ahmed, Manas R. Parida, Alberto Tosato, Lina G. AbdulHalim, Anwar Usman, Qana A. Alsulami, Banavoth Murali, Erkki Alarousu, Osman M. Bakr, and Omar F. Mohammed
    J. Mater. Chem. C, 4, pp 2894-2900, (2016)​
Keywords:
Electrostatic interactions, Quantum dots
  • Ultrafast static and diffusion-controlled electron transfer at Ag29 nanocluster/molecular acceptor interfaces
    Omar F. Mohammed, Shawkat Aly, Lina G. AbdulHalim, Tabot Besong, Giada Soldan, and Osman M. Bakr
    Nanoscale, 8, pp 5412-5416, (2016)
Keywords:
Diffusion-controlled electron transfer