Structural and interfacial properties of large area n-a-Si:H/i-a-Si:H/p-c-Si heterojunction solar cells

Özlem Pehlivan; Deneb Menda; Okan Yilmaz; Alp Osman Kodolbaş; Orhan Özdemir; Özgur Duygulu; Kubilay Kutlu; Mehmet Tomak

doi:10.1117/12.2025392

11 September 2013 Structural and interfacial properties of large area n-a-Si:H/i-a-Si:H/p-c-Si heterojunction solar cells

Özlem Pehlivan, Deneb Menda, Okan Yilmaz, Alp Osman Kodolbaş, Orhan Özdemir, Özgur Duygulu, Kubilay Kutlu, Mehmet Tomak

Author Affiliations +

Proceedings Volume 8823, Thin Film Solar Technology V; 88230T (2013) https://doi.org/10.1117/12.2025392
Event: SPIE Solar Energy + Technology, 2013, San Diego, California, United States

Abstract

Large area (72 cm²) doping inversed HIT solar cells (n-a-Si:H/i-a-Si:H/p-c-Si) were investigated by High Resolution Transmission Electron Microscopy (HR-TEM), Spectroscopic Ellipsometry (SE), Fourier Transform Infrared Attenuated Total Reflection spectroscopy (FTIR-ATR) and current-voltage (I-V) measurement. Mixture of microcrystalline and amorphous phase was identified via HR-TEM picture at the interface of i-a-Si:H/p-c-Si heterojunction. Using multilayer and Effective Medium Approximation (EMA) to the SE data, excellent fit was obtained, describing the evolution of microstructure of a-Si:H deposited at 225 °C on p-c-Si. Cody energy gap with combination of FTIR-ATR analyses were consistent with HRTEM and SE results in terms of mixture of microcrystalline and amorphous phase. Presence of such hetero-interface resulted poor open circuit voltage, V_oc, of the fabricated solar cell devices, determined by I-V measurement under 1 sun. Moreover, Voc was also estimated from dark I-V analysis, revealing consistent V_oc values. Efficiencies of fabricated cells over complete c-Si wafer (72 cm2) were calculated as 4.7 and 9.2 %. Improvement in efficiency was interpreted due to the back surface cleaning and selecting aluminum/silver alloy as front contact.

Citation Download Citation

Özlem Pehlivan, Deneb Menda, Okan Yilmaz, Alp Osman Kodolbaş, Orhan Özdemir, Özgur Duygulu, Kubilay Kutlu, and Mehmet Tomak "Structural and interfacial properties of large area n-a-Si:H/i-a-Si:H/p-c-Si heterojunction solar cells", Proc. SPIE 8823, Thin Film Solar Technology V, 88230T (11 September 2013); https://doi.org/10.1117/12.2025392

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available