The Ge based TPV cells with back-surface mirror demonstrate reflection of 85% sub-bandgap photons, external quantum yield as high as 0.9-0.95 and extremely high short circuit current of 31.6 mA/cm~2 under sunlight with cut-off at 位< 900 nm AMO spectrum. The Ge based TPV cells with ...
The absorption of photons with energy of 0.45 eV is also observed in the Fig. S1 of Supplementary Materials, indicating that an electron can be excited from IB to CB before the relaxation from IB to VB taking place. Figure 6 The differential transmittance spectra of ZnTe:O implanted and...
ARTICLE Received 20 Nov 2014 | Accepted 21 Sep 2015 | Published 6 Nov 2015 DOI: 10.1038/ncomms9685 OPEN A hot-electron thermophotonic solar cell demonstrated by thermal up-conversion of sub-bandgap photons Daniel J. Farrell1, Hassanet Sodabanlu1, Yunpeng Wang1, Masakazu Sugiyama2 & Yoshitaka...
Thus, IBSCs can absorb below bandgap photons. The growth of quantum dots in a bulk material is the most common method used to form the intermediate band. However, manufactured QD-IBSCs have low sub-bandgap current due to the low sub-bandgap absorption [5, 6]. The maximum achieved ...
Therefore, if we can enhance the filter’s transparency for bandgap photons such that it only cuts off wavelengths that are outside the absorption range of a device we aim to improve, we will be able to achieve better results and efficiency while illuminating with the same flux. This will ...
This optical confinement results in a 25-40% increase in the number of photons absorbed. An extensive numerical simulator was developed, which provides a 1-D self-consistent solution for Poisson's equation and the two continuity equations for electrons and holes. This simulator was used to ...
Intermediate band solar cells (IBSCs) pursue the increase in efficiency by absorbing below-bandgap energy photons while preserving the output voltage. Expe... J Villa,I Ramiro,JM Ripalda,... 被引量: 0发表: 2021年 Optimal Bandgap of Double Perovskite La-Substituted Bi 2 FeCrO 6 for Solar ...
By introducing intermediate band in the bandgap of silicon, molybdenum-hyperdoped black silicon materials showed thermally stable absorption to photons with energy below the bandgap of silicon (0.5-1.1 eV). We studied current-voltage characteristics of metal-black silicon-metal photodetectors prepared ...
Our investigations show a proof-of-concept that organic solar cells could utilize sub-bandgap photons via integrating up-conversion nanophosphors, which provide us a promising approach to exceed the efficiency limit of single junction organic solar cells....
This letter is on the response of gallium arsenide p-i-n diodes to sub-bandgap photons (1.55 μ m). We investigate the various regimes of sub-bandgap operation by using different light sources delivering pulses ranging from nanosecond to microsecond durations. We evidence two regimes : a ...