Superthin Solar Cells Based on AIIIBV/Ge Heterostructures

Designing of Lightweight and Ultrathin III‐V/Ge Solar Cells for Flexible Space and Terrestrial Photovoltaic Blankets

“…The short-circuit current and, most importantly, open-circuit voltage V oc were also accurately preserved in our previous experiment. [19] By now, all parameters and I-V curves of the samples shown in Figure 3 have been obtained on a proven AM0 spectrum simulation. [22] An important indicator of the success of the proposed thinning procedure is that the open-circuit voltage value remained at the initial level (within the measurements accuracy) despite the rather rough forced procedure for removing a back contact metal layer.…”

“…The short‐circuit current and, most importantly, open‐circuit voltage V oc were also accurately preserved in our previous experiment. [ 19 ] By now, all parameters and I–V curves of the samples shown in Figure 3 have been obtained on a proven AM0 spectrum simulation. [ 22 ]…”

“…However, in ref. [19], the thinned SC was transferred to a solid metalized carbon fiber substrate by gluing it with epoxy resin. This option is not flexible.…”

“…Initially, the SC with shielding glass (or without it) and without a back contact is fixed with the REVALPHA adhesive tape (detached temperature of 90 °C), which plays the technological carrier role. Then, the controllable Ge substrate etching was carried out in the H 3 PO 4 -H 2 O 2 -H 2 O solution [3,19,20] till the desired residual SC thickness. A back In contact with Ni/Cr sublayers (2 μm/50 nm/50 nm thick metal layer, respectively) was created by electron beam evaporation at a sample temperature of less than 50 °C.…”

“…The authors are furthering the development of a previously proposed method, [ 19 ] for creating flexible and ultralight SCs by thinning the Ge‐subcell of commercially available 3J or any III‐V/Ge MJ structures. This method has the potential to be used in both space and terrestrial applications.…”