WELLBUS · Study of Efficiency Enhancement Mechanisms in Quantum Well Solar Cells for Better Utilization of the Solar Spectrum (WELLBUS)
6РП — Действия „Мария Кюри“
- Период
- 2004-02-09 → 2006-02-08
- Финансиране от ЕС
- 167 665 €
- Участници
- 1
- Схема
- EIF
Линиите свързват координатора с партньорите. За проекти отпреди 2014 г. CORDIS не винаги дава точни координати. Тези точки са на ниво град или държава.
Накратко на български
Слънчевите клетки с квантови кладенци се изследват, за да се разбере как по-добре абсорбират слънчевия спектър. Това помага за повишаване на ефективността на многослойните фотоволтаични устройства, използвани в концентриращите системи.
Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.
Цел на проекта
The GalnP/GaAs/Ge tandem triple junction cells are the highest efficiency photovoltaic (PV) devices and are likely to be the first of the Third Generation" cells to enter the terrestrial PV market in concentrator applications. They employ three different solar cells stacked on top of each other to capture and convert a wider spectral range of solar radiation to electricity. The commercial viability of concentrator systems depends crucially on the use of the highest efficiency cells. The Strain-Balanced Quantum Well Solar Cell (SB-QWSC) is an innovative, nanostructured cell, pioneered by the Quantum Photovoltaic Group (QPG) at Imperial College, which has the potential to enhance the efficiency of the triple junction cell significantly by replacing the GaAs cell. The SB-QWSC increases tandem efficiency by reducing the absorption band-gap of GaAs resulting in better utilisation of the solar spectrum. Recent experimental and theoretical work based onphotoluminescence (PL), photoconductivity (PC) and electroluminescence (EL) studies have revealed that the Quasi-Fermi Level Separation (QFLS) in single quantum well (SQW) devices is smaller than expected in both the dark and the light. This implies lower recombination and hence enhanced efficiency. Furthermore, the SB-QWSC dark currents at concentrator current levels show ideality factor n=1. This suggests that minimum non-radiative recombination levels can be achieved in SB-QWSC. Finally the exciting possibility of efficiency enhancement by photon recycling can also be considered as the unavoidable radiative energy would be re-absorbed in other wells in a light-trapping environment. There is therefore a great need to clarify the mechanisms behind the general efficiency enhancement in the SB-QWSC. This will be done by extending the recent studies on QFLS in SQW devices under light illumination to SB-QWSCs."
Оригинален текст от CORDIS (на английски).
Участници
- IMPERIAL COLLEGE LONDON · LONDONКоординаторНиво градОбединеното кралство
Връзки
Данни: CORDIS, © Европейски съюз