Search Results - "Qijie Guo"

Synthesis of Cu2ZnSnS4 Nanocrystal Ink and Its Use for Solar Cells by Guo, Qijie, Hillhouse, Hugh W, Agrawal, Rakesh

“…Cu2ZnSnS4 (CZTS) and Cu2ZnSnSe4 (CZTSe) based solar cells are promising candidates for low cost solar cells due to the natural abundance and low toxicity of…”
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Earth Abundant Element Cu2Zn(Sn1−x Ge x )S4 Nanocrystals for Tunable Band Gap Solar Cells: 6.8% Efficient Device Fabrication by Ford, Grayson M, Guo, Qijie, Agrawal, Rakesh, Hillhouse, Hugh W

“…Cu2Zn(Sn1− x Ge x )S4 nanocrystals have been synthesized via batch reaction in oleylamine with no additional surfactants present. The nanocrystals are…”
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Sulfide Nanocrystal Inks for Dense Cu(In1−x Gax)(S1−y Se y )2 Absorber Films and Their Photovoltaic Performance by Guo, Qijie, Ford, Grayson M, Hillhouse, Hugh W, Agrawal, Rakesh

“…Recent developments in the colloidal synthesis of high quality nanocrystals have opened up new routes for the fabrication of low-cost efficient photovoltaic…”
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Fabrication of 7.2% Efficient CZTSSe Solar Cells Using CZTS Nanocrystals by Guo, Qijie, Ford, Grayson M, Yang, Wei-Chang, Walker, Bryce C, Stach, Eric A, Hillhouse, Hugh W, Agrawal, Rakesh

“…Earth abundant copper-zinc-tin-chalcogenide (CZTSSe) is an important class of material for the development of low cost and sustainable thin film solar cells…”
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Enhancing the performance of CZTSSe solar cells with Ge alloying by Guo, Qijie, Ford, Grayson M., Yang, Wei-Chang, Hages, Charles J., Hillhouse, Hugh W., Agrawal, Rakesh

“…The ability to alloy Cu2ZnSn(S,Se)4 with Ge provides a unique ability to band-gap engineer the absorber film by controlling the relative cation ratios. In…”
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Ink formulation and low-temperature incorporation of sodium to yield 12% efficient Cu(In,Ga)(S,Se)2 solar cells from sulfide nanocrystal inks by Guo, Qijie, Ford, Grayson M., Agrawal, Rakesh, Hillhouse, Hugh W.

“…ABSTRACT Solution phase deposition methods offer great potential for low‐cost photovoltaic device fabrication. We have previously developed a method for copper…”
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Development of CuInSe2 Nanocrystal and Nanoring Inks for Low-Cost Solar Cells by Guo, Qijie, Kim, Suk Jun, Kar, Mahaprasad, Shafarman, William N, Birkmire, Robert W, Stach, Eric A, Agrawal, Rakesh, Hillhouse, Hugh W

“…The creation of a suitable inorganic colloidal nanocrystal ink for use in a scalable coating process is a key step in the development of low-cost solar cells…”
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Patterned Langmuir−Blodgett Films of Monodisperse Nanoparticles of Iron Oxide Using Soft Lithography by Guo, Qijie, Teng, Xiaowei, Rahman, Saifur, Yang, Hong

“…Langmuir−Blodgett (LB) films of monodisperse iron oxide nanoparticles have been successfully deposited onto patterned poly(dimethylsiloxane) surfaces. These…”
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Characterization of CZTSSe photovoltaic device with an atomic layer-deposited passivation layer by Wu, Wei, Cao, Yanyan, Caspar, Jonathan V., Guo, Qijie, Johnson, Lynda K., Mclean, Robert S., Malajovich, Irina, Choudhury, Kaushik Roy

“…We describe a CZTSSe (Cu2ZnSn(S1−x,Sex)4) photovoltaic (PV) device with an ALD (atomic layer deposition) coated buffer dielectric layer for CZTSSe surface…”
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Formation of Cu-Rich and Sn-Poor CZTSSe via Cu3Sn(S,Se)4‑ZnS Solid-Solution as the Intermediate by Guo, Qijie, Caspar, Jonathan V., Roelofs, Katherine E., Subramoney, Shekhar, Rosenfeld, H. David

“…In Cu2ZnSn­(S,Se)4 (CZTSSe) thin film solar cells, it is commonly accepted that a Cu-poor and Zn-rich composition is required for high-efficiency devices…”
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CuIn(S,Se) 2thin film solar cells from nanocrystal inks: Effect of nanocrystal precursors by Ford, Grayson M., Guo, Qijie, Agrawal, Rakesh, Hillhouse, Hugh W.

“…CuIn(S,Se) 2 thin film solar cells are fabricated by selenizing CuInS 2 nanocrystals synthesized using a variety of copper and indium precursors. Specifically,…”
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High-Efficiency Solution-Processed Cu2ZnSn(S,Se)4 Thin-Film Solar Cells Prepared from Binary and Ternary Nanoparticles by Cao, Yanyan, Denny, Michael S, Caspar, Jonathan V, Farneth, William E, Guo, Qijie, Ionkin, Alex S, Johnson, Lynda K, Lu, Meijun, Malajovich, Irina, Radu, Daniela, Rosenfeld, H. David, Choudhury, Kaushik Roy, Wu, Wei

“…A new solution-based method to fabricate Cu2ZnSn(S,Se)4 (CZTSSe) thin films is presented. Binary and ternary chalcogenide nanoparticles were synthesized and…”
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Overpressure Contact Printing by Guo, Teng, Yang, Hong

“…This paper describes a new method of using elastomeric stamps in the fabrication of patterned self-assembled monolayers and nanoparticles. By applying load on…”
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A generalized and robust method for efficient thin film photovoltaic devices from multinary sulfide nanocrystal inks by Qijie Guo, Ford, G. M., Hillhouse, H. W., Agrawal, R.

“…A generalized and robust method using multinary sulfide nanocrystals for the fabrication Cu(In, Ga)(S, Se) 2 CIGSSe and Cu 2 Zn, Sn(S, Se) 4 CZTSSe thin films…”
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Development of CulnSe2 Nanocrystal and Nanoring Inks for Low-Cost Solar Cells by QIJIE GUO, SUK JUN KIM, KAR, Mahaprasad, SHAFARMAN, William N, BIRKMIRE, Robert W, STACH, Eric A, AGRAWAL, Rakesh, HILLHOUSE, Hugh W

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Impact of humidity exposure during device fabrication on CZTSSe solar cell performance by Malajovich, Irina, Yanyan Cao, Caspar, Jonathan V., Qijie Guo, Johnson, Lynda K., Boheng Ma, Choudhury, Kaushik Roy, Walls, Dennis J., Wei Wu

“…The effect of exposing Cu 2 ZnSn(S,Se) 4 films to ambient humidity during various stages of device fabrication was studied. Cu 2 ZnSn(S,Se) 4 films were made…”
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A simple solution-based route to high-efficiency CZTSSe thin-film solar cells by Qijie Guo, Yanyan Cao, Caspar, J. V., Farneth, W. E., Ionkin, A. S., Johnson, L. K., Meijun Lu, Malajovich, I., Radu, D., Choudhury, K. R., Rosenfeld, H. D., Wei Wu

“…Solution-based Cu 2 ZnSn(S,Se) 4 (CZTSSe) thin film deposition routes focusing on chemistries with attractive scalability and handling characteristics, while…”
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Effect of the selenization process on structural and device properties of nanoparticle-derived CZTSSe thin films by Choudhury, Kaushik Roy, Yanyan Cao, Caspar, Jonathan V., Qijie Guo, Johnson, Lynda K., Malajovich, Irina, Radu, Daniela, David Rosenfeld, H., Silverman, Lee, Wei Wu

“…Cu 2 ZnSn(S,Se) 4 thin films and solar cells were fabricated using binary and ternary nanoparticle precursor films selenized using three different processes…”
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Characterization and understanding of performance losses in a highly efficient solution-processed CZTSSe thin-film solar cell by Choudhury, Kaushik Roy, Yanyan Cao, Caspar, J. V., Farneth, W. E., Qijie Guo, Ionkin, A. S., Johnson, L. K., Meijun Lu, Malajovich, I., Radu, D., Rosenfeld, H. D., Wei Wu

“…We present results on the characterization of a highly efficient CZTSSe solar cell fabricated using a solution-based process, aiming to gain a better…”
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Selenization of copper indium gallium disulfide nanocrystal films for thin film solar cells by Qijie Guo, Ford, G.M., Hillhouse, H.W., Agrawal, R.

“…Recently, numerous non-vacuum methods have been demonstrated for the fabrication of Cu(In x Ga 1-x )Se 2 (CIGSe) thin films and solar cells via selenization of…”
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