摘要(英) |
This paper is focused on growing p and n-doped thin-film silicon solar cells by electron cyclotron resonance chemical vapor deposition electron cyclotron resonance-chemical vapor deposition (ECR-CVD). The characteristics of doped layers and growing conditions are discussed in this study.
The ECR-CVD is use of microwave excited gas dissociation to produce high-density plasma. The advantage of ECR-CVD are high plasma density, low ion temperature, the faster deposition rate, low ion bombardment, low operating pressure. By using different hydrogen dilution ratio, working pressure, dopant gas concentration, microwave power or concentration of argon gas mixture can grow different characteristics p, n film.
Using ECR-CVD to grow highly boron and phosphorus doped microcrystalline silicon can able to control the concentration 19 to 20 order,The crystallization rate can be controlled to 35% when the thickness of thin film silicon is limited to 100nm, while the mobility can be improved by doping with lower gas flow.The mobility can from 0.1 (cm2 / Vs) raised to 1.2 (cm2 / Vs).
Growth of amorphous silicon solar cells can be used as the doping concentration 2.3E19, carrier mobility was 1.25 (cm2 / Vs) of the p layer and the doping concentration of 6.71E19, carrier mobility was 0.884 (cm2 / Vs) of the n layer. The efficiency can reach 1.4%, 4 (mA) current density, 0.8 (V) and 42% fill factor.
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