Single-wafer integrated 140 W silicon concentrator module

Abstract

A wafer-scale-integrated (WSI) module of back-side contact (BSC) solar cells has been developed for central receiver or concentrating dish applications. Two parallel strings of five series-connected BSC cells on a single 4 in silicon wafer, mounted on a cold plate, form a 6 cm*6 cm monolithic module producing more than 140 W under 20 W/cm/sup 2/ at operating temperature. The best measured efficiency is 20.8% at around 7 W/cm/sup 2/ and at 39 degrees C cell temperature. At 25 degrees C, the monolithic module is 22% efficient at 5.8 W/cm/sup 2/.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>