Upgraded metallurgical-grade silicon solar cells with efficiency above 20%
We present solar cells fabricated with n-type Czochralski–silicon wafers grown with strongly compensated 100% upgraded metallurgical-grade feedstock, with efficiencies above 20%. The cells have a passivated boron-diffused front surface, and a rear locally phosphorus-diffused structure fabricated using an etch-back process. The local heavy phosphorus diffusion on the rear helps to maintain a high bulk lifetime in the substrates via phosphorus gettering, whilst also reducing recombination under...[Show more]
|Collections||ANU Research Publications|
|Source:||Applied Physics Letters|
|01_Zheng_Upgraded_Metallurgical-grade_Silicon_2016.pdf||1.18 MB||Adobe PDF|
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