ZIF-8,　a　kind　of　widely　studied　metal-organic　frameworks,　was　used　for　the　interfacial　modification　of　dye-sensitized　solar　cells　by　a　facile　post-treatment　strategy　for　the　first　time,　which　solved　the　problem　of　severely　decreased　short-circuit　photocurrent　in　previous　report.　After　the　surface　treatment,　the　performance　of　cells　was　obviously　improved.　The　conditions　for　the　deposition　of　ZIF-8　were　optimized.　The　best　photovoltaic　property　was　obtained　when　the　growth　time　of　ZIF-8　was　7　min　and　the　TiO2photoanode　was　post-treated　for　2　times.　Besides　the　energy　barrier　effect　of　ZIF-8　that　improved　the　open-circuit　photovoltage　and　electron　lifetime,　the　dyes　adsorbed　tightly　on　TiO2surface　was　found　to　be　a　key　point　for　the　efficient　electron　injection　and　improved　performance.　©　2014　WILEY-VCH　Verlag　GmbH　&　Co.　KGaA,　Weinheim