Operation of BaSi2 homojunction solar cells on p+-Si(111) substrates and the effect of structure parameters on their performance | Zendy

Komomo Kodama | Zendy; Yudai Yamashita | Zendy; Kaoru Toko | Zendy; Takashi Suemasu | Zendy

Open Access

Operation of BaSi₂ homojunction solar cells on p⁺-Si(111) substrates and the effect of structure parameters on their performance

Author(s) -

Komomo Kodama,

Yudai Yamashita,

Kaoru Toko,

Takashi Suemasu

Publication year - 2019

Publication title -

applied physics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.911

H-Index - 94

eISSN - 1882-0786

pISSN - 1882-0778

DOI - 10.7567/1882-0786/ab0c4f

Subject(s) - homojunction , quantum efficiency , saturation current , materials science , energy conversion efficiency , saturation (graph theory) , optoelectronics , substrate (aquarium) , electron , layer (electronics) , current density , wavelength , open circuit voltage , analytical chemistry (journal) , doping , voltage , chemistry , physics , nanotechnology , oceanography , mathematics , quantum mechanics , combinatorics , chromatography , geology

Operation of n+-BaSi2/p-BaSi2(500 nm)/p+-BaSi2 homojunction solar cells on p+-Si(111) is demonstrated, showing a saturation current density of 9.4 mA cm−2 and an open-circuit voltage of 0.11 V under AM1.5 illumination. Photogenerated electrons deep in the p-BaSi2 light absorber layer are likely to be transferred to the p+-Si side, leading to negative values of internal quantum efficiency (IQE) at longer wavelengths. The negative IQE can be solved by extending the width of depletion region in the p-BaSi2 light absorber layer by decreasing its hole concentration. The importance of Si substrate surface morphology is also discussed.

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