@proceedings {Zhao1991,
title = {Improvements in Silicon Solar Cell Performance},
year = {1991},
note = {
},
pages = {399-402},
author = {Zhao, J. and Wang A. and Dai, X. and Martin A Green and Wenham, S.R.}
}
@article {Sproul1990,
title = {Improved value for the silicon intrinsic carrier concentration at 300 K},
journal = {Applied Physics Letters},
volume = {57},
year = {1990},
note = {
},
month = {1990},
pages = {255},
issn = {00036951},
doi = {10.1063/1.103707},
author = {A. B. Sproul and Martin A Green and Zhao, J.}
}