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Self-aligned locally diffused emitter (SALDE) silicon solar cell by Jalal Salami; Akio Shibata; Daniel Meier; Edgar Kochka; Satoshi Yamanaka; Preston Davis; John Easoz; Toru Abe; Kazuo Kinoshita is a Engineering article available to read on EtoBox.

What is Self-aligned locally diffused emitter (SALDE) silicon solar cell about?

This paper presents, for the first time, a low-cost, high-throughput manufacturing approach for fabricating n-base dendritic web silicon solar cells with selectively doped emitters and self-aligned aluminum contacts using rapid thermal processing (RTP) and screen printing. The self-aligned locally diffused emitter (SALDE) structure is p + nn + where aluminum is screenprinted on a boron-doped emitter and fired in a belt furnace to form a deep self-doped p+-layer and a self-aligned positive contact to the emitter according to the well-known aluminum-silicon (AI-Si) alloying process. The SALDE structure preserves the shallow emitter (~ 0.2 ~tm) everywhere except directly beneath the emitter contact. There the junction depth is greater than 5 ~tm, as desired, in order to shield carriers in the bulk silicon from that part of the silicon surface covered by metal where the recombination rate is high, This structure is realized by using n-base (rather than p-base) substrates and by utilizing screen-printed aluminum (rather than silver) emitter contacts. Prototype dendritic web silicon (web) cells (25 cm 2 area) with efficiencies up to 13.2% have been produced.

Who reads Self-aligned locally diffused emitter (SALDE) silicon solar cell?

Author

Jalal Salami; Akio Shibata; Daniel Meier; Edgar Kochka; Satoshi Yamanaka; Preston Davis; John Easoz; Toru Abe; Kazuo Kinoshita

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0927-0248)

Published

1997

Language

EN

Field

Engineering (Physical Sciences)