从平面结到局域结：一种新的高效低成本非晶硅/晶体硅异质结太阳电池结构设计
From planar junction to local junction: A new structure design of amorphous/crystalline silicon heterojunction solar cells for high efficiency and low cost
摘要：
为了提高非晶硅/晶体硅（a-Si/c-Si）异质结太阳电池的转换效率，降低生产成本，设计了一种具有局域pn结构的非晶硅/晶体硅异质结（HACL）。利用ATLAS模拟程序对HACL太阳能电池的潜在性能进行了评估。并与本征薄膜异质结（HIT）和扩散结非晶硅晶体硅异质结（HACD）太阳电池进行了比较。模拟结果表明，HACL电池的转换效率和短路电流密度分别达到28.18%和43.06 mA/cm 2，高于HIT和HACD电池。其主要原因是（1）提高了电池两侧的光利用率和（2）提高了光生载流子的收集效率。此外，HACL结构可以减少诸如铟的稀有材料的消耗，因为透明导电氧化物（TCO）在该结构中可以是自由的。结果表明，HACL太阳能电池是一种很有前途的高效率、低成本结构。
英文摘要：
In order to obtain higher conversion efficiency and to reduce production cost for amorphous silicon/crystalline silicon (a-Si/c-Si) based heterojunction solar cells, a Heterojunction of Amorphous silicon and Crystalline silicon with Localized pn structure (HACL) has been designed. The potential performance of the HACL solar cell has been assessed by ATLAS simulation program. Its potential performance is compared with that of the Heterojunction with Intrinsic Thin film (HIT) and Heterojunction of Amorphous silicon and Crystalline silicon with Diffused junction (HACD) solar cells. The simulated results indicated that the conversion efficiency and the short-circuit current density of the HACL cell can reach to 28.18% and 43.06 mA/cm2, respectively, and are higher than that of the HIT and HACD cells. The main reasons for the great improvement are (1) to increase the light utilization rate on both sides of the cell and (2) to enhance the collection efficiency of the photocarriers. Moreover, the HACL structure can decrease the consumption of rare materials, such as indium, since the transparent conductive oxide (TCO) can be free in this structure. It is concluded that the HACL solar cell is a promising structure for high efficiency and low cost.
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