Three Mistakes We Have Made During Fabrication of Quantum Dots Solar Cell; How Can You Learn From Them
Solar cells have been in focus for decades due to their capability to convert solar energy into electrical energy. Quantum dots sensitized solar cell (QDSC) gained much consideration due to their relatively simpler device structure and similarity to dye sensitized solar cell (DSSC). QDs are capab...
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| Main Authors: | , |
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| Format: | Conference or Workshop Item |
| Language: | English |
| Published: |
2017
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| Subjects: | |
| Online Access: | http://eprints.unisza.edu.my/970/1/FH03-ESERI-18-12928.pdf http://eprints.unisza.edu.my/970/ |
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| Summary: | Solar cells have been in focus for decades due to their capability to convert solar energy into
electrical energy. Quantum dots sensitized solar cell (QDSC) gained much consideration due to their
relatively simpler device structure and similarity to dye sensitized solar cell (DSSC). QDs are
capable of delivering multiple electron per absorbed photon of sufficient energy, a phenomenon
known as multi-exciton generation (MEG). The MEG effect makes QDSCs capable of achieving
photovoltaics conversion efficiency (PCE) as high as 60 %. Regardless of the outstanding feature of
QDs, QDSCs deliver much inferior practical PCE (~8.6 %) compared to DSSCs (~13 %). Density
functional theory (DFT) calculations was engaged to shed some light on the problem in our previous
work. Realistic QDs models were empirically developed using DFT and experimental results. Three
parameters were concluded to have distinct effects on the photovoltaic (PV) properties of QDSCs.
They are (i) the best size of QDs, (ii) ligand usage, and (iii) QDs size distribution; which commonly
neglected by researchers. In this work, quantum dots – metal oxide semiconductor (MOS)
conjugates were chemically developed; spectroscopically demonstrate various electron injection
efficiency from QDs to MOS. |
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