Semitransparent organic solar cells (STOPV) are a widely acknowledged solar energy conversion technology that can simultaneously absorb invisible light for energy production while allowing visible light transmission for transparency. However

regarding STOPV integrated on building to reach practical application in the future

the harmonious unification of power conversion efficiency (PCE)

average photopic transmittance (APT)

and the infrared-light rejection rate (IRR) must be achieved. In contrast to traditional single-optimization strategies

we present an approach to enhance STOPV performance by using a ternary strategy coupled with multiple optical modulation engineering. On the materials level

by combining the wide bandgap donor PM6 and two near-infrared acceptors owing similar absorption but different end groups combinations (symmetric molecule BTP-eC9 and asymmetric molecule BTP-S9)

we have optimized the efficiency of a single-junction ternary opaque organic solar cell to 18.66%. On the device level

we propose a triple optical manipulation method by integrating an anti-reflection layer (ARC)

a tellurium dioxide (TeO2) optical layer

and a bandpass filter (BF) into the original STOPV structure

to address the see-saw effect among PCE

APT and IRR. Ultimately

our optimized STOPV achieved a PCE of 12.82% and APT of 35.70%

causing a light utilization efficiency (LUE) of 4.6%

and an infrared-light rejection rate of 96.8%

ranking one of the highest performance multifunction-STOPV.