Island-cap interface misfit modulated carrier mechanisms in p-i-n epitaxial quantum dot photovoltaic devices

ABSTRACTNovel approach to optimize quantum dot (QD) materials for specific optoelectronic applications is based on engineering of nanoscale potential profile, which is created by charged QDs. The nanoscale barriers prevent capture of photocarriers and drastically increase the photoelectron lifetime, which in turn strongly improves the photoconductive gain, responsivity, and sensitivity of photodetectors and decreases the nonradiative recombination losses of photovoltaic devices. QD charging may be created by various types of selective doping. To investigate effects of selective doping, we model, fabricated, and characterized AlGaAs/InAs QD structures with n-doping of QD layers, doping of interdot layers, and bipolar doping, which combines p-doping of QD layers with strong n-doping of the interdot space. We have measured spectral characteristics of photoresponse, photocurrent and dark current. The experimental data show that providing the same electron population of QDs, the bipolar doping creates the most contrasting nanoscale profile with the highest barriers around dots.

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Thermal Imaging with Plasmon Resonance Enhanced HgTe Colloidal Quantum Dot Photovoltaic Devices

ACS Nano ◽

10.1021/acsnano.8b03871 ◽

2018 ◽

Vol 12 (7) ◽

pp. 7362-7370 ◽

Cited By ~ 47

Author(s):

Xin Tang ◽

Matthew M. Ackerman ◽

Philippe Guyot-Sionnest

Keyword(s):

Quantum Dot ◽

Plasmon Resonance ◽

Thermal Imaging ◽

Photovoltaic Devices ◽

Colloidal Quantum Dot

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An Organic Hole Transport Layer Enhances the Performance of Colloidal PbSe Quantum Dot Photovoltaic Devices

Advanced Functional Materials ◽

10.1002/adfm.201001047 ◽

2010 ◽

Vol 20 (20) ◽

pp. 3555-3560 ◽

Cited By ~ 28

Author(s):

Chih-Yin Kuo ◽

Ming-Shin Su ◽

Yu-Chien Hsu ◽

Hui-Ni Lin ◽

Kung-Hwa Wei

Keyword(s):

Quantum Dot ◽

Hole Transport ◽

Transport Layer ◽

Hole Transport Layer ◽

Photovoltaic Devices

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How does energy filtering improve quantum-dot based photovoltaic devices

2015 IEEE 42nd Photovoltaic Specialist Conference (PVSC) ◽

10.1109/pvsc.2015.7355807 ◽

2015 ◽

Author(s):

F. Michelini ◽

A. Crepieux ◽

F. Gibelli ◽

J.-F Guillemoles ◽

N. Cavassilas ◽

...

Keyword(s):

Quantum Dot ◽

Photovoltaic Devices ◽

Energy Filtering

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(Invited) Polymer Wrapped Carbon Nanotubes As Highly Effective Hole Transporting Layers for New Perovskite and Quantum Dot Photovoltaic Devices

ECS Meeting Abstracts ◽

10.1149/ma2017-01/7/586 ◽

2017 ◽

Keyword(s):

Carbon Nanotubes ◽

Quantum Dot ◽

Photovoltaic Devices ◽

Highly Effective ◽

Hole Transporting

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Analytic Modeling of the of J–V Characteristics of Quantum Dot-Based Photovoltaic Cells

International Journal of Nanoscience ◽

10.1142/s0219581x19400830 ◽

2019 ◽

Vol 18 (03n04) ◽

pp. 1940083

Author(s):

A. Yu. Saunina ◽

V. R. Nikitenko ◽

A. A. Chistyakov ◽

M. A. Zvaizgne ◽

A. R. Tameev ◽

...

Keyword(s):

Experimental Data ◽

Solar Cells ◽

Quantum Dot ◽

Power Conversion Efficiency ◽

Predictive Power ◽

Diffusion Length ◽

Power Conversion ◽

Photovoltaic Cells ◽

Analytic Model ◽

Photovoltaic Devices

An analytic model of [Formula: see text]–[Formula: see text] characteristics of photovoltaic devices based on quantum dot (QD) solids is developed. The model yields the upper estimation of the power conversion efficiency and predicts its extremal dependence on the diffusion length of excitons. The predictive power of our model is approved by the comparison with the experimental data for PbS QD-based solar cells.

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