JTPV, a leader in n-type solar cells, has unveiled its latest “MoNo 2” n-type cell at SNEC 2024. Following the success of the previous “MoNo 1” cell, the new product introduces significant advancements in both technology and product performance.
As the latest product in the MoNo series, MoNo 2 has been built upon the foundation of its predecessor, with two new features focusing on improved half-cut cell performance and bifacial generation capabilities.
The MoNo 2 cell encompasses an innovative half-cut design with enhanced manufacturing processes. On the basis of the Stack Wafer Depo Technique, Gradient-Index ARC, J-SE, J-SE+ and J-STF, this new generation is further superimposed with JTPV’s self-developed Half-cut Edge Passivation (J-HEP) and Wave Back Surface Field (J-WBSF) technologies. These advancements yield a power gain of over 6W for standard 182-72 modules and an exceptionally high bifaciality of 90% to deliver added value to customers.
Improvement in Passivation Performance
Currently, major module suppliers opt for half-cut rather than full cells due to reduced resistive losses and an approximate 3% increase in module power output. However, laser cutting may create unpassivated edges that can result in local minority carrier recombination and cell efficiency loss, potentially inducing the risk of micro-cracks.
To address these issues, JTPV has incorporated its newly developed half-cut edge passivation technique to the MoNo 2 cell. By adding a CVD process after laser cutting, the laser damaged edges can be almost fully repaired. With an extra test and sort step to reclassify the half cells, an increase in power output of up to 6W is achievable for a standard 182-72 module.
Enhanced Bifacial Generation
An outstanding feature of MoNo 2 is its sophisticated rear side design with meticulously modulated thickness and properties of the passivation layers between metal fingers to form an optically inhomogeneous rear structure. Without affecting cell efficiencies, an improved bifaciality of up to 90% can be achieved.
This advancement is particularly beneficial in high albedo environments, offering a substantial power boost of 5-19% over JTPV’s previous cell design, thereby setting a new standard for solar energy capture and conversion.