PTQ15 polymer slashes organic solar cell costs 80% to $35,528/ kg, are greener, and have a 19.96% power-conversion efficiency

https://www.gizmochina.com/2025/05/24/breakthrough-polymer-slashes-organic-solar-cell-cost-to-one-fifth/

"streamlined 3- to 4-step fabrication with >80% yield... paired with acceptors K1/K6, PTQ15 enables ultrafast 1.40-ps charge transfer, 0.190 eV non-radiative energy loss, minimal heat waste... processing in open-air conditions at 25% humidity retains 19.37% efficiency, proving robustness for real-world manufacturing. At an estimated $0.36 per watt, nears cost-effectiveness of silicon photovoltaics... future: >20% efficiency optimizing donor-acceptor pairings/ morphology"

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