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PbS/CdS Core/Shell Nanocrystals For Solution-Processed Colloidal Quantum Dot Solar Cells

Published online by Cambridge University Press:  30 December 2014

Darren C. J. Neo,
Cheng Cheng,
Hazel E. Assender and
Andrew A. R. Watt
Darren C. J. Neo
Affiliation:
Department of Materials, University of Oxford, 16 Parks Road, Oxford OX1 3PH, United Kingdom.
Cheng Cheng
Affiliation:
Department of Materials, University of Oxford, 16 Parks Road, Oxford OX1 3PH, United Kingdom.
Hazel E. Assender
Affiliation:
Department of Materials, University of Oxford, 16 Parks Road, Oxford OX1 3PH, United Kingdom.
Andrew A. R. Watt
Affiliation:
Department of Materials, University of Oxford, 16 Parks Road, Oxford OX1 3PH, United Kingdom.
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Abstract

An epitaxial shell of cadmium sulphide is grown on lead sulphide quantum dots in order to reduce the concentration of surface defects. Thin solid films of these core/shell materials are found to have low carrier concentrations due to effective surface passivation which reduces the number of dangling bonds. In this paper PbS/CdS is used as a quasi-intrinsic layer in p-i-n photovoltaic devices where PbS acts as the p-layer and ZnO the n-layer. By studying different permutations of these layers and the degree of PbS p-type doping by annealing we optimise fill factor and open-circuit voltage.

Keywords

core/shellphotovoltaicPb

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References

REFERENCES

Kramer, I. J.; Sargent, E. H. Colloidal Quantum Dot Photovoltaics: A Path Forward. ACS Nano 2011, 5, 8506–8514.CrossRefGoogle ScholarPubMed
Tang, J.; Sargent, E. H. Infrared Colloidal Quantum Dots for Photovoltaics: Fundamentals and Recent Progress. Adv. Mater. 2011, 23, 12–29.CrossRefGoogle ScholarPubMed
Kramer, I. J.; Sargent, E. H. The Architecture of Colloidal Quantum Dot Solar Cells: Materials to Devices. Chem. Rev. 2014, 114, 863–882.CrossRefGoogle ScholarPubMed
Ip, A. H.; Thon, S. M.; Hoogland, S.; Voznyy, O.; Zhitomirsky, D.; Debnath, R.; Levina, L.; Rollny, L. R.; Carey, G. H.; Fischer, A.; et al. . Hybrid Passivated Colloidal Quantum Dot Solids. Nat. Nanotechnol. 2012, 7, 577–582.CrossRefGoogle ScholarPubMed
Lan, X.; Masala, S.; Sargent, E. H. Charge-Extraction Strategies for Colloidal Quantum Dot Photovoltaics. Nat. Mater. 2014, 13, 233–240.CrossRefGoogle ScholarPubMed
Chuang, C.-H. M.; Brown, P. R.; Bulović, V.; Bawendi, M. G. Improved Performance and Stability in Quantum Dot Solar Cells through Band Alignment Engineering. Nat. Mater. 2014.CrossRefGoogle ScholarPubMed
Guyot-Sionnest, P. Electrical Transport in Colloidal Quantum Dot Films. J. Phys. Chem. Lett. 2012, 3, 1169–1175.CrossRefGoogle ScholarPubMed
Moreels, I.; Fritzinger, B.; Martins, J. C.; Hens, Z. Surface Chemistry of Colloidal PbSe Nanocrystals. J. Am. Chem. Soc. 2008, 130, 15081–15086.CrossRefGoogle ScholarPubMed
Turyanska, L.; Elfurawi, U.; Li, M.; Fay, M. W.; Thomas, N. R.; Mann, S.; Blokland, J. H.; Christianen, P. C. M.; Patanè, A. Tailoring the Physical Properties of Thiol-Capped PbS Quantum Dots by Thermal Annealing. Nanotechnology 2009, 20, 315604.CrossRefGoogle ScholarPubMed
Neo, D. C. J.; Cheng, C.; Stranks, S. D.; Fairclough, S. M.; Kim, J. S.; Kirkland, A. I.; Smith, J. M.; Snaith, H. J.; Assender, H. E.; Watt, A. A. R. Influence of Shell Thickness and Surface Passivation on PbS/CdS Core/Shell Colloidal Quantum Dot Solar Cells. Chem. Mater. 2014, 140606160802003.CrossRefGoogle Scholar
Hines, M. A.; Scholes, G. D. Colloidal PbS Nanocrystals with Size-Tunable Near-Infrared Emission: Observation of Post-Synthesis Self-Narrowing of the Particle Size Distribution. Adv. Mater. 2003, 15, 1844–1849.CrossRefGoogle Scholar
Neo, M. S.; Venkatram, N.; Li, G. S.; Chin, W. S.; Ji, W. Synthesis of PbS/CdS Core−Shell QDs and Their Nonlinear Optical Properties. J. Phys. Chem. C 2010, 114, 18037–18044.CrossRefGoogle Scholar
Pacholski, C.; Kornowski, A.; Weller, H. Self-Assembly of ZnO: From Nanodots to Nanorods. Angew. Chem. Int. Ed Engl. 2002, 41, 1188–1191.3.0.CO;2-5>CrossRefGoogle ScholarPubMed
Zhao, H.; Chaker, M.; Wu, N.; Ma, D. Towards Controlled Synthesis and Better Understanding of Highly Luminescent PbS/CdS Core/shell Quantum Dots. J. Mater. Chem. 2011, 21, 8898.CrossRefGoogle Scholar
Choi, M.-J.; Oh, J.; Yoo, J.-K.; Choi, J.; Sim, D. M.; Jung, Y. S. Tailoring of the PbS/metal Interface in Colloidal Quantum Dot Solar Cells for Improvements of Performance and Air Stability. Energy Environ. Sci. 2014, 7, 3052.CrossRefGoogle Scholar
Cheng, C.; Lee, M. M.; Noel, N. K.; Hughes, G. M.; Ball, J. M.; Assender, H. E.; Snaith, H. J.; Watt, A. A. R. Polystyrene Templated Porous Titania Wells for Quantum Dot Heterojunction Solar Cells. ACS Appl. Mater. Interfaces 2014, 6, 14247–14252.CrossRefGoogle ScholarPubMed
Kim, G.-H.; Walker, B.; Kim, H.-B.; Kim, J. Y.; Sargent, E. H.; Park, J.; Kim, J. Y. Inverted Colloidal Quantum Dot Solar Cells. Adv. Mater. 2014, 26, 3321–3327.CrossRefGoogle ScholarPubMed
Gao, J.; Jeong, S.; Lin, F.; Erslev, P. T.; Semonin, O. E.; Luther, J. M.; Beard, M. C. Improvement in Carrier Transport Properties by Mild Thermal Annealing of PbS Quantum Dot Solar Cells. Appl. Phys. Lett. 2013, 102, 043506.CrossRefGoogle Scholar
Ko, D.-K.; Brown, P. R.; Bawendi, M. G.; Bulović, V. P-I-N Heterojunction Solar Cells with a Colloidal Quantum-Dot Absorber Layer. Adv. Mater. 2014, 26, 4845–4850.CrossRefGoogle ScholarPubMed