# Photovoltaics & Applications | Ooitech Technical Blog

> Cell and module technology explained: TOPCon, BC, HJT and perovskite routes, the materials used, the machines that build them and the process behind every watt.

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- [Photovoltaics & Applications 118](./Photovoltaics.html)
- [Electrical & Fundamentals 23](./Electrical-Fundamentals.html)
- [Industry & Insights 22](./Industry-Insights.html)

## Our Latest Photovoltaics & Applications

![How to Cut Multi-Piece Solar Cells Better?](https://cdn.ooitech.com/runtime/image/w800_h600_fitblur_v2_15ce62ff44f3df3b9754e60099c852f1.webp)

- [** Jerry](./how-to-cut-multi-piece-solar-cells-better-the-counterintuitive-truth-about-edge-loss-in-n-type-topcon-shj-and-bc-cells.html)
- [** 348 Views](./how-to-cut-multi-piece-solar-cells-better-the-counterintuitive-truth-about-edge-loss-in-n-type-topcon-shj-and-bc-cells.html)

### How to Cut Multi-Piece Solar Cells Better?

A Nano Energy study from Soochow University overturns 20 years of industry wisdo···

![Inside a 600MW TOPCon Full-Auto Solar Panel Production](https://cdn.ooitech.com/runtime/image/w800_h600_fitblur_v2_2026080545797359.jpg.webp)

- [** Jerry](./inside-a-600mw-topcon-full-auto-solar-panel-production-line.html)
- [** 309 Views](./inside-a-600mw-topcon-full-auto-solar-panel-production-line.html)

### Inside a 600MW TOPCon Full-Auto Solar Panel Production

A close look at Ooitech's 600MW TOPCon full-auto solar panel production line, fr···

![BC-TOPCon's Last Backside Battle: Keep](https://cdn.ooitech.com/runtime/image/w800_h600_fitblur_v2_2026080419779051.webp)

- [** Jerry](./bc-topcons-last-backside-battle-keep-the-bottom-siox-frozen-zone-the-middle-layer-with-alox-siox.html)
- [** 259 Views](./bc-topcons-last-backside-battle-keep-the-bottom-siox-frozen-zone-the-middle-layer-with-alox-siox.html)

### BC-TOPCon's Last Backside Battle: Keep

How next-gen back-contact TOPCon cells push past 27% by freezing the bottom SiOx···

![UVID in TOPCon Solar Cells: Non-Contact IV Testing](https://cdn.ooitech.com/runtime/image/w800_h600_fitblur_v2_17aeb9818f648b0a8226d34423b2a293.webp)

- [** Jerry](./uvid-in-topcon-solar-cells-non-contact-iv-testing-tracks-passivation-degradation-and-6-72-efficiency-loss.html)
- [** 324 Views](./uvid-in-topcon-solar-cells-non-contact-iv-testing-tracks-passivation-degradation-and-6-72-efficiency-loss.html)

### UVID in TOPCon Solar Cells: Non-Contact IV Testing

A study on UV induced degradation (UVID) in TOPCon solar cells using non-contact···

![Steel Plate Printing + Local Poly-Silicon Finger:](https://cdn.ooitech.com/runtime/image/w800_h600_fitblur_v2_625b79809fbdf15023835c47b28098ee.webp)

- [** Jerry](./steel-plate-printing-local-poly-silicon-finger-topcons-next-move-is-already-happening.html)
- [** 312 Views](./steel-plate-printing-local-poly-silicon-finger-topcons-next-move-is-already-happening.html)

### Steel Plate Printing + Local Poly-Silicon Finger:

How steel plate printing and local poly-silicon (poly finger) technology help TO···

![Cell Manufacturing Process: Back Contact Cell to Module](https://cdn.ooitech.com/runtime/image/w800_h600_fitblur_v2_2026073010101126.webp)

- [** Jerry](./from-cell-to-module-the-manufacturing-process-of-back-contact-bc-solar-modules.html)
- [** 449 Views](./from-cell-to-module-the-manufacturing-process-of-back-contact-bc-solar-modules.html)

### Cell Manufacturing Process: Back Contact Cell to Module

A step-by-step look at how back-contact (BC) solar cells become finished modules···

![TOPCon Cell UVID Study: Non-Contact IV Testing Tracks](https://cdn.ooitech.com/runtime/image/w800_h600_fitblur_v2_17aeb9818f648b0a8226d34423b2a293.webp)

- [** Jerry](./topcon-cell-uvid-study-non-contact-iv-testing-tracks-passivation-degradation-and-6-72-efficiency-loss.html)
- [** 271 Views](./topcon-cell-uvid-study-non-contact-iv-testing-tracks-passivation-degradation-and-6-72-efficiency-loss.html)

### TOPCon Cell UVID Study: Non-Contact IV Testing Tracks

A TOPCon solar cell UVID study uses ToF-SIMS, depth-profile XPS, EQE and electri···

![Latest PIP Research: Chemical Evolution](https://cdn.ooitech.com/runtime/image/w800_h600_fitblur_v2_7f797526b12f6e13e0c7d70cc0cabf75.webp)

- [** Jerry](./latest-pip-research-chemical-evolution-and-electrical-degradation-of-topcon-solar-cells-under-uv-exposure.html)
- [** 320 Views](./latest-pip-research-chemical-evolution-and-electrical-degradation-of-topcon-solar-cells-under-uv-exposure.html)

### Latest PIP Research: Chemical Evolution

A detailed review of recent Progress in Photovoltaics research explaining how UV···

![Silver-Free Solar Cells: Copper Paste and Low-Silver](https://cdn.ooitech.com/runtime/image/w800_h600_fitblur_v2_e128f05e3e415d4dfd34ec5626ec0f3a.webp)

- [** Jerry](./the-silver-free-debate-returns-less-silver-copper-paste-or-copper-plating-which-route-is-more-reliable.html)
- [** 464 Views](./the-silver-free-debate-returns-less-silver-copper-paste-or-copper-plating-which-route-is-more-reliable.html)

### Silver-Free Solar Cells: Copper Paste and Low-Silver

A detailed comparison of silver reduction, silver-coated copper paste, copper-al···

![Above 26.3% Efficiency: What's Left on the Rear?](https://cdn.ooitech.com/runtime/image/w800_h600_fitblur_v2_2026072418751974.webp)

- [** Jerry](./above-26-3-efficiency-what-is-left-to-optimize-on-the-rear-n-type-rear-contacts-pursue-bifacial-synergy-while-p-type-rear-contacts-move-toward-back-ju.html)
- [** 274 Views](./above-26-3-efficiency-what-is-left-to-optimize-on-the-rear-n-type-rear-contacts-pursue-bifacial-synergy-while-p-type-rear-contacts-move-toward-back-ju.html)

### Above 26.3% Efficiency: What's Left on the Rear?

A technical comparison of the 26.34% back-junction p-TOPCon cell and the 26.66% ···

![Photovoltaic Module UV Light-Conversion Film:](https://cdn.ooitech.com/runtime/image/w800_h600_fitblur_v2_e39f3cfaa82636ad260570401f1ff97e.webp)

- [** Jerry](./photovoltaic-module-uv-light-conversion-film-functions-working-principle-and-key-quality-parameters.html)
- [** 365 Views](./photovoltaic-module-uv-light-conversion-film-functions-working-principle-and-key-quality-parameters.html)

### Photovoltaic Module UV Light-Conversion Film:

UV light-conversion film converts ultraviolet light into blue light within the 4···

![Why Metallization Sets the Efficiency Ceiling](https://cdn.ooitech.com/runtime/image/w800_h600_fitblur_v2_f9ffca1de7a427f300420d4a7cdf1faf.webp)

- [** Jerry](./why-metallization-sets-the-efficiency-ceiling-for-high-efficiency-solar-cells.html)
- [** 357 Views](./why-metallization-sets-the-efficiency-ceiling-for-high-efficiency-solar-cells.html)

### Why Metallization Sets the Efficiency Ceiling

A technical look at why metal-semiconductor contact, contact resistance, passiva···

- [**](/Photovoltaics_5.html)
- [**](/Photovoltaics_7.html)

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## Our Latest Products

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SC-20A full automatic laser cutting machine for solar cells and silicon wafers, featuring 1500 cells/hour capacity, ±100um positioning accuracy

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Ooitech offers professional solar panel EL tester and VI tester machines (OPT-M960B, OPT-M951B, OPT-M950B) with SONY industrial cameras

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Solar cell processing equipment for PERC, TOPCon, HJT & BC cells – cutting, stringing, testing. Supports G1/M6/M10/M12 sizes.

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OPT-S110H Offline String EL Tester from Ooitech delivers high-speed electroluminescence inspection for solar cell strings up to 1250mm.

![Solar Panel Layup and Bussing Machine: 10W to 600W Modules, TOPCon BC PERC HJT](https://cdn.ooitech.com/runtime/image/w800_h600_fitblur_v2_1790216004194913.webp)

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### Solar Panel Layup and Bussing Machine: 10W to 600W Modules, TOPCon BC PERC HJT

Solar panel layup and bussing machine in six models, SAW-100A to SAW-600A, for 10 W to 600 W modules: high-frequency bus ribbon soldering, 15 s per group, inline or standalone.

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### Solar Panel Sealant and Tape: Silicone, Butyl, PET

Solar panel sealant and tape for module assembly: silicone frame sealant, butyl tape and busbar insulation tape, UV-resistant for 25-year outdoor exposure.