Stability enhancement of GaInP/GaAs/Ge triple-junction solar cells using Al2O3 moisture-barrier layer

Ultra-Lightweight, Flexible InGaP/GaAs Tandem Solar Cells with a Dual-Function Encapsulation Layer

“…Figure c compares the reflectance for solar cells with and without the Al 2 O 3 /SiO 2 encapsulation layer that is evaluated using the finite difference time domain (FDTD) technique and experimental measurements. Since Al 2 O 3 (50 nm) deposited by ALD acts as a reasonable moisture barrier, the SiO 2 thickness (44 nm) was optimized through FDTD simulation. As seen in the experimental measurements using a UV–vis–NIR spectrophotometer, solar cells with an Al 2 O 3 /SiO 2 encapsulation layer reflect less light than those without an Al 2 O 3 /SiO 2 encapsulation layer.…”

“…In contrast, solar cells with the Al 2 O 3 /SiO 2 encapsulation layer are observed to be stable during the test. The degradation of solar cells resulting from moisture is closely related to shunt paths. , We use the Al 2 O 3 /SiO 2 encapsulation layer as a moisture barrier, which prevents the degradation of solar cells.…”

“…Typically, III–V solar cells are significantly degraded by exposure to ambient moisture. , Therefore, it is necessary to block moisture to improve the stability of III–V solar cells. As a result, various encapsulation layers based on Al 2 O 3 , SiN x , SiO x , or organic–inorganic hybrid materials have been reported. − Among them, Al 2 O 3 deposited by atomic layer deposition (ALD) is known to act as a good barrier from moisture and heat. , Furthermore, an antireflection coating (ARC) layer that effectively minimizes the reflection of light at the surface of solar cells is an essential part of solar cells to fabricate high-efficiency solar cells. In order to have a clear ARC effect, the closer the material to the area where the light reaches, the lower the refractive index of that material.…”

“…32−34 Among them, Al 2 O 3 deposited by atomic layer deposition (ALD) is known to act as a good barrier from moisture and heat. 35,36 Furthermore, an antireflection coating (ARC) layer that effectively minimizes the reflection of light at the surface of solar cells is an essential part of solar cells to fabricate high-efficiency solar cells. In order to have a clear ARC effect, the closer the material to the area where the light reaches, the lower the refractive index of that material.…”

Увеличение фототока Ga(In)As-субэлемента в многопереходных солнечных элементах GaInP/Ga(In)As/Ge

“…Сегодня среди фотопреобразователей солнечной энергии наибольшим КПД в промышленном производстве обладают многопереходные (МП) солнечные элементы (СЭ) GaInP/Ga(In)As/Ge c тремя фотоактивными p−n-переходами, выполненными на основе согласованных по параметру решетки материалов Ga 0.51 In 0.49 P, Ga 0.99 In 0.01 As и Ge и соединяющих их встречно включенных n ++ −p ++ -туннельных диодов (ТД) [1][2][3][4][5][6][7]. При этом лабораторный рекорд эффективности ∼ 46% (AM1.5D) был достигнут для четырехпереходного СЭ [8].…”