Surface trap passivated colloidal quantum dots for application in p-n heterojunction thin film solar cells

• Grant number: 14/18327-9
• Support Opportunities: Scholarships abroad - Research Internship - Post-doctor
• Start date: November 03, 2014
• End date: October 02, 2015
• Field of knowledge: Engineering - Materials and Metallurgical Engineering
• Principal Investigator: Ana Flávia Nogueira
• Grantee: Emre Yassitepe
• Supervisor: Edward Hartley Sargent
• Host Institution: Instituto de Química (IQ). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
• Institution abroad: University of Toronto (U of T), Canada
• Associated to the scholarship: 13/05798-0 - An Investigation of Surface Trap Passivated Colloidal (Ag,Cu)(In,Ga)(Se,S)2 Nanoparticles for Thin Film Solar Cell Applications, BP.PD

Abstract

This proposal describes research in materials and processes for synthesis and characterization of surface trap passivated (Ag,Cu)(In)(S,Se)2 and PbS colloidal quantum dots (CQD) and their application in p-n heterojunction solar cells. CQD thin film solar cells promise low fabrication costs with high photon conversion efficiency, which is ideal for commercial applications. One of the prerequisites to achieve high efficiencies is to establish electronic coupling of CQDs by decreasing the interparticle spacing when casted in thin film form. As-synthesized CQDs do not achieve satisfactory results in solar cells because of long chain surface ligands that increase the interparticle spacing and incomplete passivation of surface traps. Therefore, it is necessary to perform a ligand exchange procedure to minimize the interparticle spacing and to passivate the surface traps. Prof. Sargent's group published remarkable results on surface trap passivated PbS CQD thin film solar cells with efficiencies reaching close to 10%. A comprehensive study on synthesis of (Ag,Cu)(In)(S,Se)2 PbS and Cd(S,Se) CQDs and suitable passivation mechanisms will be carried out to reach high solar cell efficiencies. Additionally a new device configuration, quantum heterojunction, will be studied for PbS/Cd(S,Se) and (Ag,Cu)(In)(S,Se)2/Cd(S,Se) heterojunctions that realizes full utilization of CQDs as active layer/window layer. This project will be performed under the supervision of Prof. Sargent at Department of Electrical Engineering at University of Toronto. (AU)

Scientific publications

(8)

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

KIM, YOUNGHOON; YASSITEPE, EMRE; VOZNYY, OLEKSANDR; COMIN, RICCARDO; WALTERS, GRANT; GONG, XIWEN; KANJANABOOS, PONGSAKORN; NOGUEIRA, ANA F.; SARGENT, EDWARD H.. Efficient Luminescence from Perovskite Quantum Dot Solids. ACS APPLIED MATERIALS & INTERFACES, v. 7, n. 45, p. 25007-25013, NOV 18 2015. (14/18327-9)

YANG, ZHENYU; YASSITEPE, EMRE; VOZNYY, OLEKSANDR; JANMOHAMED, ALYF; LAN, XINZHENG; LEVINA, LARISSA; COMIN, RICCARDO; SARGENT, EDWARD H.. Self-Assembled PbSe Nanowire:Perovskite Hybrids. Journal of the American Chemical Society, v. 137, n. 47, p. 14869-14872, DEC 2 2015. (14/18327-9)

FAN, FENGJIA; KANJANABOOS, PONGSAKORN; SARAVANAPAVANANTHAM, MAYURAN; BEAUREGARD, ERIC; INGRAM, GRAYSON; YASSITEPE, EMRE; ADACHI, MICHAEL M.; VOZNYY, OLEKSANDR; JOHNSTON, ANDREW K.; WALTERS, GRANT; et al. Colloidal CdSe1-xSx Nanoplatelets with Narrow and Continuously-Tunable Electroluminescence. Nano Letters, v. 15, n. 7, p. 4611-4615, JUL 2015. (14/18327-9)

NING, ZHIJUN; GONG, XIWEN; COMIN, RICCARDO; WALTERS, GRANT; FAN, FENGJIA; VOZNYY, OLEKSANDR; YASSITEPE, EMRE; BUIN, ANDREI; HOOGLAND, SJOERD; SARGENT, EDWARD H.. Quantum-dot-in-perovskite solids. Nature, v. 523, n. 7560, p. 324+, JUL 16 2015. (14/18327-9)

ZHANG, BO; ZHENG, XUELI; VOZNYY, OLEKSANDR; COMIN, RICCARDO; BAJDICH, MICHAL; GARCIA-MELCHOR, MAX; HAN, LILI; XU, JIXIAN; LIU, MIN; ZHENG, LIRONG; et al. Homogeneously dispersed multimetal oxygen-evolving catalysts. Science, v. 352, n. 6283, p. 333-337, APR 15 2016. (14/18327-9)

YASSITEPE, EMRE; YANG, ZHENYU; VOZNYY, OLEKSANDR; KIM, YOUNGHOON; WALTERS, GRANT; CASTANEDA, JUAN ANDRES; KANJANABOOS, PONGSAKORN; YUAN, MINGJIAN; GONG, XIWEN; FAN, FENGJIA; et al. Amine-Free Synthesis of Cesium Lead Halide Perovskite Quantum Dots for Efficient Light-Emitting Diodes. ADVANCED FUNCTIONAL MATERIALS, v. 26, n. 47, p. 8757-8763, DEC 20 2016. (14/18327-9, 13/16911-2, 13/05798-0)

YANG, ZHENYU; JANMOHAMED, ALYF; LAN, XINZHENG; DE ARQUER, F. PELAYO GARCIA; VOZNYY, OLEKSANDR; YASSITEPE, EMRE; KIM, GI-HWAN; NING, ZHIJUN; GONG, XIWEN; COMIN, RICCARDO; et al. Colloidal Quantum Dot Photovoltaics Enhanced by Perovskite Shelling. Nano Letters, v. 15, n. 11, p. 7539-7543, NOV 2015. (14/18327-9)

CASTANEDA, JUAN A.; NAGAMINE, GABRIEL; YASSITEPE, EMRE; BONATO, LUIZ G.; VOZNYY, OLEKSANDR; HOOGLAND, SJOERD; NOGUEIRA, ANA F.; SARGENT, EDWARD H.; BRITO CRUZ, CARLOS H.; PADILHA, LAZARO A.. Efficient Biexciton Interaction in Perovskite Quantum Dots Under Weak and Strong Confinement. ACS NANO, v. 10, n. 9, p. 8603-8609, SEP 2016. (14/18327-9, 13/16911-2, 13/05798-0, 14/21928-4)