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Charge Transport Modulation of a Flexible Quantum Dot Solar Cell Using a Piezoelectric Effect

Charge Transport Modulation of a Flexible Quantum Dot Solar Cell Using a Piezoelectric Effect
Cho, Yul-JaeGiraud, PaulHou, BoLee, Young-WooHong, JohnLee, Sang-HyoPak, Sang-YeonLee, Ju-WonJang, Jae EunMorris, Stephen M.Sohn, Jung-InnCha, Seung-NamKim, Jong-Min
DGIST Authors
Jang, Jae Eun
Issue Date
Advanced Energy Materials, 8(3), 1700809
Article Type
Article in Press
Absorption SpectroscopyCarrier TransportCharge Carrier BehaviorsCharge CarriersCharge Transport ModulationColloidal Quantum DotsElectric FieldsEnergy GapFlexible Solar CellsInfrared WavelengthsLarge Absorption CoefficientLead SulfideLead Sulfide Quantum DotsModulationNanocrystalsPiezoelectric EffectPiezoelectricityPower Conversion EfficienciesQuantum ChemistryQuantum Dot Solar CellsSemiconductor Quantum DotsSolar Cells
Colloidal quantum dots are promising materials for flexible solar cells, as they have a large absorption coefficient at visible and infrared wavelengths, a band gap that can be tuned across the solar spectrum, and compatibility with solution processing. However, the performance of flexible solar cells can be degraded by the loss of charge carriers due to recombination pathways that exist at a junction interface as well as the strained interface of the semiconducting layers. The modulation of the charge carrier transport by the piezoelectric effect is an effective way of resolving and improving the inherent material and structural defects. By inserting a porous piezoelectric poly(vinylidenefluoride-trifluoroethylene) layer so as to generate a converging electric field, it is possible to modulate the junction properties and consequently enhance the charge carrier behavior at the junction. This study shows that due to a reduction in the recombination and an improvement in the carrier extraction, a 38% increase in the current density along with a concomitant increase of 37% in the power conversion efficiency of flexible quantum dots solar cells can be achieved by modulating the junction properties using the piezoelectric effect. © 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Wiley-VCH Verlag
Related Researcher
  • Author Jang, Jae Eun Advanced Electronic Devices Research Group(AEDRG)
  • Research Interests Nanoelectroinc device; 생체 신호 센싱 시스템 및 생체 모방 디바이스; 나노 통신 디바이스
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Department of Information and Communication EngineeringAdvanced Electronic Devices Research Group(AEDRG)1. Journal Articles

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