Diverse Tech Fuels Carbon Neutrality Race
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In September 2023, Longi Green Energy made headlines by expressing its commitment to Bifacial Cell (BC) technology, igniting intense discussions in the photovoltaic industry over the merits and drawbacks of BC versus TOPCon (Tunnel Oxide Passivated Contact) technologiesThis debate has garnered considerable attention, particularly as leading TOPCon manufacturers, such as Jinko Solar, have shown interest in venturing into the BC sector on a limited scale.
The question arises: has BC triumphed in this ongoing discourse? The answer remains inconclusiveZhang Yingbin, a prominent figure in the industry, posits that if BC firms are also experimenting with TOPCon, then it is only logical for TOPCon companies to explore BC capabilities as well.
He elaborates, “If Trina Solar someday detects a robust demand from its clients, and if BC technology begins to gain traction in specific niches—perhaps due to customers in Europe and the U.S
being willing to pay a premium for aesthetically appealing products—we may consider producing some BC panelsHowever, this would not impede our primary technological roadmap, which continues to focus on advancing towards TOPCon 3.0 and perovskite tandem cells.”
Industry experts suggest framing this as a debate not merely over competing technologies, but rather as a discussion regarding whether TOPCon is the present while BC may represent the futureTOPCon currently holds a dominant position in the market, supported by empirical data regarding its performance and market shareNonetheless, the question lingers: could BC emerge as the predominant technology in the future or could TOPCon maintain its relevance as both present and future technology? Opinions on this matter vary significantly.
It is crucial to note that TOPCon and BC are not binary oppositions, with neither presenting an insurmountable barrier between the two
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Industry professionals advocating for BC's prominence acknowledge a critical point: unlike the dichotomy of monocrystalline versus multicrystalline or N-type versus P-type cells, BC technology exhibits enhanced compatibility by integrating with TOPCon or Heterojunction Technology (HJT), potentially transforming into Tandem Bifacial Cells (TBC) or Heterojunction Bifacial Cells (HBC).
Moreover, comprehensive empirical studies conducted have yielded contrasting conclusions about the generation efficiencies of differing technologiesThe disparities in these findings may be influenced by the generational differences between products; for instance, comparing the first-generation P-type BC products against TOPCon, which does not show considerable advantages, or evaluating the performance of second-generation BC against TOPCon 1.0 productsAs things stand, 2025 is anticipated to witness a significant ramp-up in both the second generation of BC technology and the rollout of TOPCon 2.0, marking the beginning of a more significant competition.
Currently, the photovoltaic industry finds itself entrenched in fierce competition, with widespread acknowledgment that technological innovation is a pivotal means to surmount this trough
Although TOPCon has faced criticism for overcapacity and severe homogenization, upgrades and improvements are still actively pursuedNotably, leading companies are enhancing their patent protections, suggesting a tempering in the rate of technological diffusionEven within the TOPCon label itself, we may witness a stratification, an evolution toward several tiers marked by varying degrees of performance and efficiency.
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