Design, fabrication and characterisation of a 24.4% efficient interdigitated back contact solar cell
نویسندگان
چکیده
The interdigitated back contact (IBC) solar cells developed at the Australian National University have resulted in an independently confirmed (Fraunhofer Institut für Solare Energiesysteme (ISE) CalLab) designated-area efficiency of 24.4 ± 0.7%, featuring short-circuit current density of 41.95mA/cm, open-circuit voltage of 703mV and 82.7% fill factor. The cell, 2 × 2 cm in area, was fabricated on a 230 μm thick 1.5Ω cm n-type Czochralski wafer, utilising plasma-enhanced chemical vapour deposition (CVD) SiNx front-surface passivation without front-surface diffusion, rear-side thermal oxide/low-pressure CVD Si3N4 passivation stack and evaporated aluminium contacts with a finger-to-finger pitch of 500 μm. This paper describes the design and fabrication of lab-scale high-efficiency IBC cells. Characterisation of optical and electronic properties of the best produced cell is made, with subsequent incorporation into 3D device modelling used to accurately quantify all losses. Loss analysis demonstrates that bulk and emitter recombination, bulk resistive and optical losses are dominant and suggests a clear route to efficiency values in excess of 25%. Additionally, laser processing is explored as a means to simplify the manufacture of IBC cells, with a confirmed efficiency value of 23.5% recorded for cells fabricated using damage-free deep UV laser ablation for contact formation. Meanwhile all-laser-doped cells, where every doping and patterning step is performed by lasers, are demonstrated with a preliminary result of 19.1% conversion efficiency recorded. Copyright © 2014 John Wiley & Sons, Ltd.
منابع مشابه
Development of Epitaxial Interdigitated Back Contact (IBC) Solar Cell as a Test Platform for Novel Antireflection and Light-trapping Schemes
The design of a test platform for novel antireflection and light trapping schemes, based on the interdigitated back contact (IBC) solar cell concept, is presented. Two enhancements to the front surface of the basic cell design are explored: Addition of a thin SiO2 passivation layer between the thin film antireflective (AR) coating and incorporation of a front surface field via the formation of ...
متن کاملBoron implanted, laser annealed p emitter for n-type interdigitated back-contact solar cells
Ion implantation and laser processing technologies are very attractive for the fabrication of industrially feasible interdigitated back-contact (IBC) solar cells. In this work, p emitters were fabricated by boron implantation and laser annealing, and the electrical properties of emitters were investigated. An emitter sheet resistance (Rsh) in the range of 30-200 Ω/□ could be achieved by varying...
متن کاملHigh efficiency black silicon Interdigitated Back Contacted solar cells on p- and n-type c-Si substrates
This work demonstrates the high potential of Al2O3 passivated black silicon in high efficiency Interdigitated Back Contacted (IBC) solar cells by reducing surface reflectance without jeopardizing surface passivation. Very low reflectance values, below 0.7% in the 300-1000 nm wavelength range, together with striking surface recombination velocities values of 17 and 5 cm/s on pand n-type crystall...
متن کاملDevelopment of Screen-Printed Texture-Barrier Paste for Single-Side Texturization of Interdigitated Back-Contact Silicon Solar Cell Applications
Continuous cost reduction of silicon-based solar cells is needed to lower the process time and increase efficiency. To achieve lower costs, screen-printed texture-barrier (SPTB) paste was first developed for single-side texturization (ST) of the interdigitated back-contact (IBC) for silicon-based solar cell applications. The SPTB paste was screen-printed on silicon substrates. The SPTB paste wa...
متن کاملFabrication of Organic Solar Cells with Branched Cauliflower-Like Nano Structures as a Back Electrode Replicated from a Natural Template of Cicada Wing Patterns
Nanostructures of noble metal materials have been used in organic solar cells for enhancement of performance and light trapping. In this study, we have introduced branched silver cauliflower-like nanopatterns as sub-wavelength structured metal grating in organic solar cells. Self-assembled fabrication process of branched nanopatterns was carried out on a bio-template of cicada wing nanonipple a...
متن کامل