دینامیک های حامل در پیل های خورشیدی چند پیوندی کوانتوم نقطه ای تحت تمرکز Carrier Dynamics in Quantum-Dot Multijunction Solar Cells Under Concentration
- نوع فایل : کتاب
- زبان : فارسی
- ناشر : IEEE
- چاپ و سال / کشور: 2014
توضیحات
رشته های مرتبط: مهندسی برق و مهندسی انرژی، انرژی های تجدیدپذیر، فناوری انرژی، سیستم های انرژی، تولید، انتقال و توزیع، مهندسی الکترونیک و افزاره های میکرو و نانو الکترونیک
Description
The key performance metrics of quantum-dot (QD)- lattice-matched multijunction solar cells (MJSCs) composed of InGaP/(In)GaAs/Ge with InAs/GaAs QDs are explored under highconcentration illumination with a focus on the carrier dynamics in the QD layers of the middle subcell. An effective medium approach is used to describe generation and recombination in the QD system, including carrier escape and capture from the weakly con- fining quantum well and the QD states. At a concentration of 1000 suns, simulations indicate that the specific QD MJSC studied outperforms a standard MJSC by 1.1% in relative efficiency operating at 25 °C. However, this gain in efficiency is highly dependent on the confinement potentials of the wetting layer, as well as the resulting current mismatch between the top and middle subcells when carrier escape rates from within the wetting layer confinements are reduced.
