Jingjia Ji

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A method to laminate a thin monocrystalline Si layer to a conductive and fracture-resistant carrier such as steel has been developed, resulting in a practical design for high volume production of robust ultra-thin (10-20 μm) “kerfless” Si wafers. With this technology front and rear cell features based on the world-record PERL cell(More)
Perpendicular multiple busbar wires have proven an effective way of interconnecting standard screen printed solar cells with high reliability and low cell to module loss. The technology is also an effective way to interconnect plated solar cells, where conventional soldered interconnects may be problematic. However, the full benefits of this interconnection(More)
Thin crystalline silicon solar cells have the potential to achieve high efficiency due to the potential for increased voltage. Thin silicon wafers are fragile; therefore, means of support must be provided. This paper reports the design, development, and analysis of an 18-μm crystalline silicon solar cell electrically integrated with a steel alloy(More)
Since rear emitter characterization is the crucial factor for aluminum back junction n-type cells, the emphasis of this paper is focused on the quality of this Al-Si alloy layer. Diffusion profile test is used to describe the diffusion of Al in the silicon rear side. It is found that the Al-Si alloy layer's thickness of about 6 μm should be better.(More)
Since front surface field characterization is one of the crucial factors for aluminum back junction n-type cells, the emphasis of this paper is focused on the quality of this n<sup>+</sup> layer. Oxidation process is wildly used for high efficiency solar cells. Higher temperature and thicker SiOx layers can provide a better passivation effect. However(More)
Surface reflectivity is one of the important factors for solar cells. The anisotropic etching behavior of different types of monocrystalline silicon was studied in this paper. The etching rate is determined as a function of temperature, crystal orientation, and etchant composition. It is found that the etching rate of n-type silicon is faster than that of(More)
Copper plated contacts have the potential to become the dominant front metallization technology over silver contacts if several key issues can be solved. These are addressed in this work. Through large batches of cells produced at Suntech on Pluto's 0.5 GW production line, it is shown that: adhesion concerns can be over come by optimized nickel seed layers(More)
In this paper, progress results on the next generation Pluto technology were reported. In the next generation Pluto, we focused on the rear surface design, by improvement of the back internal reflection and passivation we got 20.3% cell efficiency with very high J<sub>sc</sub>. Still there is further improvement of the cell design to get high FF and Eff.
The light intensity distribution inside organic solar cells is described by optical propagation matrix and the quantity of effective excitons is defined in this paper. The quantity of effective excitons describes the total intensity near the donor/acceptor interface, which can contribute to the generation of holes and electrons. The optimum structure then(More)
Small molecule solar cells with structure of ITO/ZnPc/C<sub>60</sub>/LiF/Al were fabricated by vacuum evaporation method, and thermal annealing treatment was considered to be an effective and economized approach to further improve the power conversion efficiency and lifetime of devices. The optimal annealing process was 100&#x00B0;C, 20min in air ambient,(More)