Progress on metal is exceptional. I presume" back lit" means reflective sunlight also harnessed as it reflects off the metal substrate. You only need 10% efficiency on this type of application. The potential for this application of the technology alone is enormous hence one of the worlds global leaders is sniffing around.
India and China have whiff of what Turkey has already realised. The Arabs are now envisaging a desert covered with cheap solar panels rivalling the oil deposits that lay beneath they now know cannot possibly be burnt in a atmosphere already saturated with way too much carbon, as evidenced by the current global heat wave, that's why they are trying to sell Aramco to mugs before its worthless.
GSL Price at posting:
17.0¢ Sentiment: Hold Disclosure: Held