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Inkjet Printing All Inorganic Halide Perovskite Inks for Photovoltaic Applications
Published on: January 22, 2019
Heterojunction photovoltaics using printed colloidal quantum dots as a photosensitive layer.
Alexi C Arango1, David C Oertel, Youfeng Xu
1Department of Electrical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
Nano Letters
|January 24, 2009
Summary
We developed a novel bilayer photovoltaic device using cadmium selenide (CdSe) quantum dots (QDs) and an organic thin film. This device achieves a high open circuit voltage (0.8 V) and 10% internal quantum efficiency.
Area of Science:
- Materials Science
- Nanotechnology
- Photovoltaics
Background:
- Quantum dots (QDs) offer tunable optoelectronic properties for solar cell applications.
- Organic hole-transporting materials provide efficient charge extraction pathways.
- Heterojunction architectures are crucial for optimizing photovoltaic device performance.
Purpose of the Study:
- To fabricate and characterize a novel bilayer photovoltaic device.
- To investigate the performance of a heterojunction between CdSe QDs and TPD.
- To explore the potential of microcontact stamping for QD film deposition.
Main Methods:
- Fabrication of a bilayer device using colloidal cadmium selenide (CdSe) quantum dots (QDs).
- Formation of a heterojunction with N,N'-diphenyl-N,N'-bis(3-methylphenyl)[1,1'-biphenyl]-4,4'-diamine (TPD) organic thin film.
- Nondestructive printing of QD film onto TPD using microcontact stamping.
Main Results:
- The device structure accommodates varying QD sizes.
- An open circuit voltage of 0.8 V was achieved with symmetric electrodes.
- An internal quantum efficiency of 10% was observed at the first QD absorption peak.
Conclusions:
- The demonstrated bilayer device shows promising performance for photovoltaic applications.
- Microcontact stamping is a viable method for QD film integration.
- The QD-TPD heterojunction enables efficient charge generation and extraction.
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