CIGS Technology


Cu(In,Ga)(Se,S)2, also known as CIGS (or CIGSSe), is a promising photovoltaic material to convert sun light into electricity. Nowadays, the photovoltaic conversion efficiency for lab-scaled CIGS solar cells reaches nearly 23%, potentially outperforming multi-crystalline silicon competitors. Meanwhile, the CIGS modules can be fabricated onto not only conventional glass substrates but also flexible ones, providing more flexibility for product applications.




Beauty of CIGS


Apart from that, CIGS-based modules feature out-door performance excellence. That is,  CIGS products generate more output power in the real-condition world; such a power boosting factor, with respect to silicon-based solar cells, has been demonstrated up to 15%. The field-site comparison (based on 2 MW installation capacity) consistently indicates the excellent out-door performance.





The following features account for the excellent out-door performance for CIGS panels, including (a) higher temperature coefficient, (b) unique light-soaking benefits, and (c) tolerance to partial shading. 




(a)Higher temperature coefficient: 

As temperature increases, the output power of solar panels tend to slightly decrease. CIGS modules, however, experience a lower drop in output power than typical silicon- based PV.


(b) Unique light-soaking benefits:

Under light illumination, the photovoltaic performance of CIGS modules can be significantly improved. Such a phenomenon is called "Light soaking effect”.


(c) Tolerance to partial shading:

Under partial shading from neighbouring objects, such as trees and other panels, CIGS panels continue to work. This is attributed to the in-parallel interconnection between cells.




Our CIGS


Our CIGS technology adopts the most advanced two-step process, e.g., sputtering of Cu-In-Ga metallic precursor layers, followed by the selenization and sulfurization (SAS) process.


The CIGS absorber is deposited onto the Mo-coated substrate. The buffer and window layers are fabricated to complete CIGS solar cells. A tempered cover glass is laminated to the CIGS solar cell with EVA marriage. To complete a CIGS module, a junction box is assembled.


Our mission is to close the efficiency gap between lab cells and production modules by enhancing CIGS module performances, rendering CIGS to be an optimum PV solution for producing low-cost clean energy.