Abstract:
The present invention relates to a method for manufacturing semiconductor thin films. In particular, it relates to the manufacturing of (Ag x Cu 1-x ) 2 ZnZ (S y Se 1-y ) 4 thin films, wherein x and y can be selected between 0 and 1 and wherein Z can be selected from Sn, Ge, Si, Pb. The method avoids the loss of Z during annealing, resulting in semiconductor material of a high quality.
Abstract:
Disclosed are an inline chemical vapor deposition method and system for fabricating a device. The method includes transporting a web or discrete substrate through a deposition chamber having a plurality of deposition modules. A buffer layer, a window layer and a transparent conductive layer are deposited onto the substrate during passage through a first deposition module, a second deposition module and a third deposition module, respectively. Advantageously, the steps for generating the buffer layer, window layer and transparent conductive layer are performed sequentially in a common vacuum environment of a single deposition chamber and the use of a conventional chemical bath deposition process to deposit the buffer layer is eliminated. The method is suitable for the manufacture of different types of devices including various types of solar cells such as copper indium gallium diselenide solar cells.
Abstract:
Badabscheidungslösung zur nasschemischen Abscheidung einer Metallsulfidschicht und zugehörige Herstellungsverfahren. Die Erfindung bezieht sich auf eine Badabscheidungslösung zur nasschemischen Abscheidung einer Metallsulfidschicht, auf ein Verfahren zur Herstellung einer derartigen Badabscheidungslösung sowie auf ein Verfahren zur Herstellung einer Metallsulfidschicht auf einem Substrat unter Verwendung einer solchen Badabscheidungslösung. Eine erfindungsgemäße Badabscheidungslösung enthält ein Metallsalz, ein Organosulfid, einen Chelatkomplexbildner, der mit Metallionen des Metallsalzes einen Chelatkomplex bildet, und Ammoniumhydroxid. Verwendung z.B. zur nasschemischen Abscheidung von ZnS- Pufferschichten auf Absorberschichten bei der Fertigung von photovoltaischen Dünnschichtbauelementen.
Abstract:
Improved methods and apparatus for forming thin-film layers of semiconductor material absorber layers on a substrate web. According to the present teachings, a semiconductor layer may be formed in a multi-zone process whereby various layers are deposited sequentially onto a moving substrate web. At least one layer is deposited from a mixed gallium indium source.
Abstract:
L'Invention est relative à un procédé de réalisation d'une jonction pn dans une cellule photovoltaïque en couches minces à base de CZTS, comprenant; a) une étape de dépôt d'une couche de précurseurs contenant du zinc, de l'étain et du cuivre, la quantité de zinc étant supérieure à celle nécessaire pour transformer les précurseurs en un matériau photovoltaïque du type CZTS et b) une étape de recuit des précurseurs, sous atmosphère de soufre et/ou de sélénium, de façon à obtenir une couche photovoltaïque en CZTS et une couche tampon en ZnS 1-x Se x , avec x compris entre 0 et 1.
Abstract:
본 발명은 이중의 밴드갭 기울기를 가지는 CZTS계 박막을 제조하는 방법에 관한 것으로, Cu 2 ZnSnS 4 박막층을 형성하는 단계; Cu 2 ZnSn(S,Se) 4 박막층을 형성하는 단계; 및 Cu 2 ZnSnS 4 박막층을 형성하는 단계를 포함한다. 본 발명의 다른 형태에 따른 이중의 밴드갭 기울기가 형성된 CZTS계 태양전지의 제조방법은, 후면 전극을 형성하는 단계; 상기 후면 전극의 위에 상기한 방법으로 CZTS계 박막층을 형성하는 단계를 포함한다. 본 발명의 또 다른 형태에 따른 CZTS계 태양전지는, 후면 전극; 및 상기 후면 전극 위에 형성된 CZTS계 박막층을 포함하며, 상기 CZTS계 박막층은, Cu 2 ZnSnS 4 박막층, Cu 2 ZnSn(S,Se) 4 박막층 및 Cu 2 ZnSnS 4 박막층이 순차로 형성되고, Cu 2 ZnSn(S,Se) 4 박막층의 밴드갭 에너지가 Cu 2 ZnSnS 4 박막층의 밴드갭 에너지보다 낮은 것을 특징으로 한다. 본 발명에 의한 이중의 밴드갭 기울기가 형성된 CZTS계 박막층은 표면측의 밴드갭이 높아서 개방전압이 증가하고 재결합이 감소하며, 후면측의 밴드갭이 높아서 전자이동도는 증가함으로써, 태양전지의 효율을 향상시키는 효과가 있다.
Abstract:
A method of fabricating a solar cell involves electroplating a Group IIB-VIA material as a first or sub-layer over a junction partner layer, and then forming a second layer, also of a Group IIB-VIA material over the sub-layer. Both the sub-layer and the second layer comprise Te. The electroplating is performed at relatively low temperatures, as for example, below 100°C. Forming the sub-layer by low temperature electroplating produces a small grained compact film that protects the interface between the sub-layer and the junction partner during the formation of the second layer.
Abstract:
A method for using atomic layer epitaxy (ALE) and/or migration enhanced epitaxy (MEE) to grow high efficiency quantum wells in II-VI laser diodes. The substrate and previously grown layers of the laser diode are heated to a temperature less than or equal to about 200 DEG C in an MBE chamber. Sources of Cd, Zn, and Se are injected alternately into the chamber to grow a short-period strained-layer superlattice (SPSLS) quantum well layer including overlaying monolayers of Cd, Zn and Se. The quantum well layer is described by the notation [(CdSe)m(ZnSe)n]p where m, n and p are integers.