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논문 기본 정보

자료유형
학술저널
저자정보
강성구 (한국화학연구원) 이창완 (한국화학연구원) 정윤장 (한국화학연구원) 김창균 (한국화학연구원) 김성탁 (고려대학교) 김동환 (고려대학교) 이영국 (한국화학연구원)
저널정보
한국태양광발전학회 Current Photovoltaic Research Current Photovoltaic Research (CPVR) Vol.2 No.4
발행연도
2014.12
수록면
173 - 176 (4page)

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We have investigated the seed layer formation of front side contact using the inkjet printing process. Conductive silver ink was printed on textured Si wafers with 80 nm thick SiNx anti reflection coating (ARC) layers and thickened by light induced plating (LIP). The inkjet printable sliver inks were specifically formulated for inkjet printing on these substrates. Also, a novel method to prepare nano-sized glass frits by the sol-gel process with particle sizes around 5 nm is presented. Furthermore, dispersion stability of the formulated ink was measured using a Turbiscan. By implementing these glass frits, it was found that a continuous and uniform seed layer with a line width of 40㎛ could be formed by a inkjet printing process. We also investigated the contact resistance between the front contact and emitter using the transfer length model (TLM). On an emitter with the sheet resistance of 60 Ω/sq, a specific contact resistance (pc) below 10 mΩ · cm² could be achieved at a peak firing temperature around 700 °C. In addition, the correlation between the contact resistance and interface microstructures were studied using scanning electron microscopy (SEM). We found that the added glass particles act as a very effective fire through agent, and Ag crystallites are formed along the interface glass layer.

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