Abstract:
In order to improve a thin film solar cell with an amorphous silicon absorber layer being in single or in tandem configuration, the addressed absorber layer of a- Si:H is manufactured by plasma enhanced vapor deposition in an RF-SiH 4 plasma, wherein the deposition is performed at at least one of at the process pressure below 0.5mbar and of at an RF power density below 370W/14000cm 2 .
Abstract:
A solar cell having an open loop voltage that approaches a critical voltage range when exposed to light. A circuit, connected to the solar cell, is configured to load the solar cell when the open loop voltage of the solar cell reaches a threshold within a predetermined range of the critical voltage range.
Abstract:
An amorphous material such as silicon is doped with a dopant, such as boron, in small amounts effective to reduce light-induced degradation. The dopant preferably is added in the vapor deposition of the amorphous material and results in a concentration of less than about 5x10 atoms/cm in a film. The films may be used in applications such as photovoltaic devices, xerography drums, facsimile elements, thin film transistors, and particle detectors.
Abstract translation:诸如硅之类的无定形材料以少量掺杂有掺杂剂,例如硼,以有效降低光致降解。 掺杂剂优选在无定形材料的气相沉积中加入,并导致膜中小于约5×10 18原子/ cm 3的浓度。 这些膜可以用于诸如光伏器件,静电鼓,传真元件,薄膜晶体管和粒子检测器的应用中。
Abstract:
Die Erfindung betrifft ein Verfahren zum Stabilisieren einer photovoltaischen Silizium-Solarzelle, mit einem Regenerationsschritt, wobei ein Injizieren von Ladungsträgern in einem Halbleitersubstrat der auf zumindest 50°C erwärmten Solarzelle erfolgt. Die Erfindung ist dadurch gekennzeichnet, dass vor dem Regenerationsschritt ein Degradationsschritt erfolgt, wobei die Solarzelle mittels Strahlung, insbesondere Laserstrahlung, mit einer Strahlungsintensität von zumindest 5.000W/m 2 beaufschlagt und gleichzeitig die Solarzelle aktiv gekühlt wird.Die Erfindung betrifft weiterhin eine Vorrichtung zum Stabilisieren einer photovoltaischen Silizium-Solarzelle
Abstract translation:本发明涉及一种方法,用于稳定一个硅光伏太阳能电池,包括再生步骤,其中在一个半导体衬底中注入电荷载体加热至至少50执行℃的太阳能电池。 本发明的特征在于,先于再生步骤中,Degradationsschritt,由此通过辐射的太阳能电池,特别是激光辐射,暴露于至少5.000W / m 2的辐射强度,而在太阳能电池wird.Die主动冷却发明还涉及一种装置,用于稳定 硅光伏太阳能电池
Abstract:
Apparatus and method for plasma deposition of thin film photovoltaic materials at microwave frequencies. The apparatus avoids unintended deposition on microwave transmission elements that couple microwave energy to deposition species. The apparatus includes a microwave applicator with conduits passing therethrough that carry deposition species. The applicator transfers microwave energy to the deposition species to energize them to a reactive state conducive to formation of a thin film. The conduits physically isolate deposition species that would react or otherwise combine to form a thin film material at the point of microwave power transfer. The deposition species are separately energized and swept away from the point of power transfer to prevent premature thin film deposition. Suitable precursors include those that contain silicon, germanium, fluorine, and/or hydrogen. The invention enables formation of silicon-containing amorphous semiconductors that exhibit high mobility, low porosity, little Staebler-Wronski degradation, and low defect concentration.
Abstract:
The invention relates to a method for manufacturing a thin film solar cell, comprising the sequential steps of a) depositing a positively doped Si layer (3), b1) depositing a first intrinsic a-Si:H layer (21) at a first deposition rate, b2) depositing a second intrinsic a-Si:H layer (22) at a second deposition rate, and c) depositing a negatively doped Si layer (5), whereby the second deposition rate is greater than the first deposition rate. The thin film solar cell manufactured is characterized by an increased initial and stabilized efficiency while at the same time the overall deposition rate, even by depositing two different intrinsic layers (21, 22), is kept at a reasonable and economic level.
Abstract:
Apparatus and methods for forming a silicon-containing i-layer on a substrate for a thin film photovoltaic cell are disclosed. The apparatus includes a chamber body defining a processing region containing the substrate, a hydrogen source and a silane source coupled to a plasma generation region, an RF power source that applies power at a power level in the plasma generation region to generate a plasma and deposit the silicon-containing i-layer at a selected deposition rate to a selected thickness and a controller. The controller controls the power level and the deposition rate of the i-layer on the substrate such that the thin film solar cell exhibits light induced damage that conforms to a linear fit of the product of the RF power, the deposition rate and the selected thickness of the i-layer. In accordance with further aspects of the present invention, the controller controls the RF power and the deposition rate so that a product (x) of the RF power in watts, the deposition rate of the i-layer in nm per min and the thickness of the i-layer in nm is less than a predetermined number y and satisfies the equation y = 5E11 *x + 3.3749 plus or minus a margin.