>23% middle cell (1 cm2) on glass; stability T80 >500h

D3.1 will summarize the development of single junction cells using 1.4-1.6 eV Pk as the absorber, with cell area of 1 cm2. Over 23% PCE is targeted and above 80% of its initial PCE should be maintained under 500 hours of light soaking. This deliverable is related to Task 3.2.