Abstract Long-persistent luminescence (LPL) materials have applications from safety signage to bioimaging; however. existing organic LPL (OLPL) systems do not align with human scotopic vision. which is sensitive to blue light. We present a strategy to blueshift the emissions in binary OLPL systems by upconverting the charge-transfer (CT) to a locally excited (LE) singlet state. https://foldlyers.shop/product-category/measurement/