Spatially resolved determination of dark saturation current and series resistance of silicon solar cells

Abstract

Luminescence images of silicon solar cells contain information about local recombination properties and local series resistance. It is difficult to separate the information and interpret single images correctly and quantitatively though, which greatly limits the use of single luminescence images, in particular for the application as an in-production characterization tool. We therefore developed a fast method based on photoluminescence imaging for a spatially resolved coupled determination of the dark saturation current and series resistance (C-DCR)

Multi-wire Interconnection of Busbar-free Solar Cells

“…Six one-cell PV modules with Gen 2 cells are manufactured and measured by C-DCR [10]. A good agreement between the measured global series resistance from C-DCR and the series resistance determined by a flasher has been achieved.…”

Imaging photocurrent collection losses in solar cells

“…Some methods analyze the local properties of solar cells such as series resistance or dark saturation current. [1][2][3][4][5] However, these evaluation methods rely on approximations and simplifications that are not universally valid in a spatially extended system of distributed diodes and resistors. 6 Recently, a quantitative imaging method based on a linear reciprocity relationship for photocurrent collection was proposed.…”

Minority carrier lifetime of silicon solar cells from quasi-steady-state photoluminescence

“…Overcoming the restriction to short circuit conditions, the advanced light beam induced current technique CELLO [5] provides spatially resolved current voltage characteristics of solar cells. The emergence of optical imaging techniques has brought about several approaches that can be applied to solar cells (based on infrared emission/absorption by free carriers [6], or on luminescence [7][8][9][10]) while not being restricted to short circuit conditions. Our recent focus of interest in this regard has been a contactless time dependent photoluminescence lifetime technique, which is referred to as quasi-steady-state photoluminescence (QSSPL) [11,12].…”