Solid State Science and Technology, Vol. 20, No 1 & 2 (2012) 75-81

ISSN 0128-7389

75

NON-DESTRUCTIVE EVALUATION OF BIFACIAL SOLAR CELL

THROUGH SEM CHARACTERIZATION

Suhaila Sepeai*, M.Y.Sulaiman, Saleem H.Zaidi and Kamaruzzaman Sopian

Solar Energy Research Institute (SERI), Universiti Kebangsaan Malaysia,

43650 Bangi, Selangor, Malaysia

*Corresponding author: suhailas@ukm.my

.

ABSTRACT

Bifacial solar cell is a specially designed solar cell for the production of electricity from

both sides of solar cell. Bifacial solar cell is an active field of research since its

advantages on making photovoltaic (PV) more competitive together with current efforts

to increase efficiency and to lower material costs. This paper reports on the fabrication

of bifacial solar cells with a structure of n+pp+. This fabrication used phosphorus-oxytrichloride

(POCl3) diffusion as emitter source, and aluminium (Al) diffusion using

screen-printing process as back surface filed (BSF). This n+pp+ bifacial structure was

sandwiched by silicon nitride (SiN) as anti reflective coating, silver (Ag) as a front

contact and silver/aluminum (Ag/Al) as a back contact. The n+ and p+ layer was

analyzed using Scanning Electron Microscope (SEM). The open circuit voltage (VOC)

obtained by this bifacial solar cell was 580 mV for the front surface and 560 mV for the

back surface, while the short circuit current (Isc) achieved were 0.47 A and 0.23 A for a

front and back surface, respectively.

 

Keywords: Bifacial solar cell; POCl3 diffusion; Al-alloyed back surface field; surface Combination

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