I'm interested in measures using a WCT-100 Silicon-Wafer Lifetime Tester, for characterize surface recombination velocity, emitter and bulk minority-carrier lifetime in solar cells processing. I'll be very glad for any help about preparing the samples and techniques to perform the measures. Thanks. -- ******************************************************************************** ******** Universidade de Sao Paulo Escola Politecnica Departamento de Engenharia Eletrônica Laboratório de Microeletrônica - Sala C2-70 Av. Prof. Luciano Gualberto, travessa 3, N°158 CEP 05424-970, CP 61548 São Paulo/SP/Brazil Tel: (+55 11) 818-5256 Fax: (+55 11) 818-5585 ******************************************************************************** ********