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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Jongwon Lee Honsberg, C.B. |
| Copyright Year | 2013 |
| Description | Author affiliation: Sch. of Electr., Comput. & Energy Eng., Arizona State Univ., Tempe, AZ, USA (Jongwon Lee; Honsberg, C.B.) |
| Abstract | The threshold energy $(E_{th})$ over 100% quantum yield (QY) is a key factor to determine the performance of multiple exciton generation (MEG) solar cells. By investigating non-idealities of MEG models, it is critical to consider non-idealities in $E_{th}$ for the onset of MEG processes. Detailed balance calculations show that despite a large experimental emphasis on the maximum quantum yield, the threshold energy has a substantial and significant effect. The first effect is that at threshold energies between 2 and 3Eg (for one sun) or 3 and 4Eg for maximum concentration, even theoretical benefits of the MEG process disappear. Since measured values are within this range, this is an important effect to consider. The second effect is that the inclusion of non-ideal threshold energies increases the optimum band gap, moving to values consistent with silicon. |
| Sponsorship | IEEE Electron Devices Soc. |
| Starting Page | 1050 |
| Ending Page | 1053 |
| File Size | 580862 |
| Page Count | 4 |
| File Format | |
| DOI | 10.1109/PVSC.2013.6744321 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2013-06-16 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Photonic band gap Photovoltaic cells Photonics Excitons Sun Materials Thermodynamics detailed balance calculations multiple exciton generation solar cells threshold energy quantum yield thermodynamic limit |
| Content Type | Text |
| Resource Type | Article |
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