研究领域

Nanomaterials and Surface Chemistry Solar cells Nanostructured thin films Molecular precursor design

Nanomaterials are a unique class of matter that bridge atomic and bulk properties, and whose dimensions are often directly correlated to their optical and electrical properties. Nanocrystals are ideal templates for the active layers inside numerous technologies, including solar cells, photo-catalysts, LEDs, and batteries. The synthesis, characterization, and device application of novel semiconducting, metal, and metal oxide nanoparticles is one of Dr. van Embden’s major ongoing research themes. Surface Chemistry must be carefully optimized within any nanocrystal-based technology. The formulation of novel nanocrystal-based “inks” and their successful application within electronic devices requires optimal surface chemistry. Nanocrystal surface chemistry plays an important role in wide variety of properties, including their catalytic activity, photoluminescence, charge transport phenomena, and film forming properties. Solar cells are one of the most attractive renewable energy applications. The ability to solution process a solar cell in air at mild temperatures is unparalleled in its capacity to significantly reduce the cost of solar cell manufacture. Using a combination of wet chemical techniques we explore a number of novel routes to achieve high efficiency solar cells, including CZTSe, CuSbS2, CIGS, and perovskite solar cells. Nanostructured thin films can possess enhanced optical and electrical properties compared to their bulk counterparts. There is a strong structure-function relation within such films. We investigate the production of functional nanostructured thin films using solution-based methods, as well as post deposition film processing conditions. Molecular precursor design may be used to develop specialized precursors that are designed to decompose into bulk metals or semiconductors upon mild heating. Specific focus is given to novel molecular precursors conducive to the deposition of metal oxide, chalcogenide and phosphide thin films. The structure of the molecular precursor dictates the decomposition pathway, by-product formation (contaminants), as well as the composition, phase, and morphology of the resultant bulk material.

近期论文

查看导师新发文章 （温馨提示：请注意重名现象，建议点开原文通过作者单位确认）

Alsaif, M.,Chrimes, A.,Daeneke, T.,Balendhran, S.,Bellisario, D.,Son, Y.,Field, M.,Zhang, W.,Nili Ahmadabadi, H.,Nguyen, E.,Latham, K.,Van Embden, J.,Strano, M.,Ou, J.,Kalantar Zadeh, K. (2016). High-performance field effect transistors using electronic Inks of 2D molybdenum oxide nanoflakes In: Advanced Functional Materials, 26, 91 - 100 Alsaif, M.,Field, M.,Daeneke, T.,Chrimes, A.,Zhang, W.,Carey, B.,Berean, K.,Walia, S.,van Embden, J.,Zhang, B.,Latham, K.,Kalantar Zadeh, K.,Ou, J. (2016). Exfoliation solvent dependent plasmon resonances in two-dimensional sub-stoichiometric molybdenum oxide nanoflakes In: ACS Applied Materials and Interfaces, 8, 3482 - 3493 Jumabekov, A.,Della Gaspera, E.,Xu, Z.,Chesman, A.,van Embden, J.,Bonke, S.,Bao, Q.,Vak, D.,Bach, U. (2016). Back-contacted hybrid organic-inorganic perovskite solar cells In: Journal of Materials Chemistry C, 4, 3125 - 3130 van Embden, J.,Bourgeois, L.,Della Gaspera, E.,Waddington, L.,Yin, Y.,Medhekar, N.,Jasieniak, J.,Chesman, A. (2016). The formation mechanism of Janus nanostructures in one-pot reactions: the case of Ag-Ag8GeS6 In: Journal of Materials Chemistry A, 4, 7060 - 7070 Nguyen, E.,Carey, B.,Ou, J.,van Embden, J.,Della Gaspera, E.,Chrimes, A.,Spencer, M.,Zhuiykov, S.,Kalantar Zadeh, K.,Daeneke, T. (2015). Electronic tuning of 2D MoS2 through surface functionalization In: Advanced Materials, 27, 6225 - 6229 Paglia, F.,Vak, D.,Van Embden, J.,Chesman, A.,Martucci, A.,Jasieniak, J.,Della Gaspera, E. (2015). Photonic sintering of copper through the controlled reduction of printed CuO nanocrystals In: ACS Applied Materials and Interfaces, 7, 25473 - 25478 Della Gaspera, E.,Kennedy, D.,Van Embden, J.,Chesman, A.,Gengenbach, T.,Weber, K.,Jasieniak, J. (2015). Flash-assisted processing of highly conductive zinc oxide electrodes from water In: Advanced Functional Materials, 25, 7263 - 7271 Della Gaspera, E.,Duffy, N.,Van Embden, J.,Waddington, L.,Bourgeois, L.,Jasieniak, J.,Chesman, A. (2015). Plasmonic Ge-doped ZnO nanocrystals In: Chemical Communications, 51, 12369 - 12372 Vak, D.,Van Embden, J.,Wong, W.,Watkins, S. (2015). Optically monitored spray coating system for the controlled deposition of the photoactive layer in organic solar cells In: Applied Physics Letters, 106, 1 - 5 Van Embden, J.,Chesman, A.,Jasieniak, J. (2015). The heat-up synthesis of colloidal nanocrystals In: Chemistry of Materials, 27, 2246 - 2285