TY - JOUR AU - Seong-Eun Park AU - Joseph Kopanski AU - Youn-Seon Kang AU - Larry Robins C2 - Physica Status Solidi DA - 2005-03-24 00:03:00 LA - en PB - Physica Status Solidi PY - 2005 TI - Surface photovoltage spectroscopy of minority carrier diffusion lengths in undoped and Si-doped GaN epitaxial films ER -