Title :
High-efficiency screen-printed planar solar cells on single crystalline silicon materials
Author :
Ebong, A. ; Hilali, M. ; Upadhyaya, V. ; Rounsaville, Brian ; Ebong, I. ; Rohatgi, A.
Author_Institution :
Sch. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA, USA
Abstract :
In this paper we report on the fabrication, characterization and analysis of high efficiency planar screen-printed solar cells with high sheet resistance emitter ∼ 100 Ω/square. Three single crystalline materials were used in this study including; boron doped magnetically stabilized Cz (MCz), gallium-doped Cz (GaCz) and float zone (FZ). For these three materials, a wide range of resistivities was investigated including Fz -0.6-4.1 Ω-cm, MCz 1.2-5.3 Ω-cm and Ga-Cz 2.6-33 Ω-cm. Energy conversion efficiencies of 17.7% were achieved on both Fz (0.6-Ω-cm) and MCz (1.2-Ω-cm) while 16.9% was obtained on GaCz silicon material. The 17.7% efficiency achieved on these two materials is the highest energy conversion efficiency reported on a planar screen-printed silicon solar cell. These results demonstrate the importance of high sheet resistance emitter in achieving high efficiency manufacturable solar cells.
Keywords :
boron; electrical resistivity; elemental semiconductors; gallium; silicon; solar cells; zone melting; 16.9 percent; 17.7 percent; Si:B; Si:Ga; boron doped magnetically stabilized Cz; energy conversion efficiencies; float zone; gallium-doped Cz; high sheet resistance emitter; screen-printed planar solar cells; single crystalline silicon materials; Boron; Crystalline materials; Crystallization; Energy conversion; Fabrication; Magnetic analysis; Magnetic materials; Photovoltaic cells; Sheet materials; Silicon;
Conference_Titel :
Photovoltaic Specialists Conference, 2005. Conference Record of the Thirty-first IEEE
Print_ISBN :
0-7803-8707-4
DOI :
10.1109/PVSC.2005.1488347
