Organic　inorganic　hybrid　perovskite　materials　have　had　remarkable　success　in　photovoltaics　due　to　their　superior　optoelectronic　properties　and　compositional　abundance.　Most　advances　focus　on　the　improvement　of　the　heterojunction,　in　which　nonperovskite　materials　are　employed　at　the　pertaining　interfaces.　Herein　we　demonstrate　the　modification　of　perovskite　absorber　by　incorporation　of　CsPbBr3　nanocrystals,　which　is　congeneric　to　the　absorber　in　terms　of　crystal　structure　and　stoichiometry.　It　led　to　significant　enhancement　in　photovoltaic　performance　in　the　corresponding　devices,　which　was　mainly　attributed　to　the　improved　carrier　dynamics　over　the　resultant　heterojunction.　Therefore,　a　different　strategy　is　suggested　for　further　improvement　of　the　perovskite　heterojunction　by　using　congeneric　materials.