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Addendum

Addendum: Tanabe, K. A Review of Ultrahigh Efficiency III-V Semiconductor Compound Solar Cells: Multijunction Tandem, Lower Dimensional, Photonic Up/Down Conversion and Plasmonic Nanometallic Structures. Energies, 2009, 2, 504-530.

1
Institute of Industrial Science, University of Tokyo, Tokyo 153–8505, Japan
2
Institute for Nano Quantum Information Electronics, University of Tokyo, Tokyo 153–8505, Japan
Energies 2009, 2(3), 695-696; https://doi.org/10.3390/en20300695
Submission received: 25 August 2009 / Accepted: 26 August 2009 / Published: 26 August 2009

Introduction

I have stated in my recent review article [1] that no direct observation of multiple exciton generation (MEG) in the shape of photocurrent extracted from a semiconductor had been made yet. However, there have been indeed a couple of reports on the photocurrent measurements for colloidal II-VI semiconductor compound quantum dot (QD) and polymer-QD composite solar cells and photodetectors to indicate MEG in the QDs, including demonstrations of over-100% external quantum efficiencies [2,3,4]. Particularly, Sukhovatkin et al. have presented a universal spectral quantum efficiency enhancement curve dependent only on bandgap-normalized photon energy consistent among photodetectors with varied PbS QD bandgap energies as a signature of MEG, eliminating potential artifactual explanations for the observed photocurrent enhancement represented by external trap states induced absorption or transitions [5].

References and Notes

  1. Tanabe, K. A review of ultrahigh efficiency III-V semiconductor compound solar cells: multijunction tandem, lower dimensional, photonic up/down conversion and plasmonic nanometallic structures. Energies 2009, 2, 504–530. [Google Scholar] [CrossRef]
  2. Qi, D.; Fischbein, M.; Drndic, M.; Selmic, S. Efficient polymer-nanocrystal quantum-dot photodetectors. Appl. Phys. Lett. 2005, 86, 093103. [Google Scholar] [CrossRef]
  3. Kim, S.J.; Kim, W.J.; Sahoo, Y.; Cartwright, A.N.; Prasad, P.N. Multiple exciton generation and electrical extraction from a PbSe quantum dot photodetector. Appl. Phys. Lett. 2008, 92, 031107. [Google Scholar] [CrossRef]
  4. Kim, S.J.; Kim, W.J.; Cartwright, A.N.; Prasad, P.N. Carrier multiplication in a PbSe nanocrystal and P3HT/PCBM tandem cell. Appl. Phys. Lett. 2008, 92, 191107. [Google Scholar] [CrossRef]
  5. Sukhovatkin, V.; Hinds, S.; Brzozowski, L.; Sargent, E.H. Colloidal quantum-dot photodetectors exploiting multiexciton generation. Science 2009, 324, 1542–1544. [Google Scholar] [CrossRef] [PubMed]

Share and Cite

MDPI and ACS Style

Tanabe, K. Addendum: Tanabe, K. A Review of Ultrahigh Efficiency III-V Semiconductor Compound Solar Cells: Multijunction Tandem, Lower Dimensional, Photonic Up/Down Conversion and Plasmonic Nanometallic Structures. Energies, 2009, 2, 504-530. Energies 2009, 2, 695-696. https://doi.org/10.3390/en20300695

AMA Style

Tanabe K. Addendum: Tanabe, K. A Review of Ultrahigh Efficiency III-V Semiconductor Compound Solar Cells: Multijunction Tandem, Lower Dimensional, Photonic Up/Down Conversion and Plasmonic Nanometallic Structures. Energies, 2009, 2, 504-530. Energies. 2009; 2(3):695-696. https://doi.org/10.3390/en20300695

Chicago/Turabian Style

Tanabe, Katsuaki. 2009. "Addendum: Tanabe, K. A Review of Ultrahigh Efficiency III-V Semiconductor Compound Solar Cells: Multijunction Tandem, Lower Dimensional, Photonic Up/Down Conversion and Plasmonic Nanometallic Structures. Energies, 2009, 2, 504-530." Energies 2, no. 3: 695-696. https://doi.org/10.3390/en20300695

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