The　multifunctional　silica-coated　Au　nanobowtie　(GNB@SiO2)　core-shell　structure　was　embedded　in　organic　solar　cells　(OSCs),　and　an　intense　performance　promotion　of　the　devices　was　achieved　by　optimizing　the　shape　and　the　size　of　the　GNB@SiO2.　The　light　absorption　of　the　active　layer　was　increased　with　GNB@SiO2　doping　concentration　increasing　until　the　doping　concentration　exceeds　10 nM.　The　devices　obtain　the　best　J-V　characteristics　when　GNB@SiO2　doping　concentration　is　10 nM.　Comparing　with　that　of　the　control　cells,　the　optimal　performance　of　the　devices　with　GNB@SiO2　incorporated　was　significantly　increased　by　47%.　The　finite-difference　time-domain　method　was　used　to　simulate　the　special　asymmetry　shape　and　the　size　of　the　multifunctional　GNB@SiO2　impact　on　the　performance　of　the　OSCs.　The　electric　field　intensity　|E|2　in　the　different　planes　revealed　that　the　local　surface　plasmon　resonance　(LSPR)　and　far-field　scattering　effect　played　an　important　role　in　the　light　absorption　of　the　devices.　The　cooperation　effect　of　LSPR　near-field　and　the　far-field　scattering　resulted　in　the　electric　field　redistribution　of　the　active　layer　as　the　result　of　the　absorption　enhanced.　©　2020,　Springer　Nature　B.V.