Develop low-cost carbon counter electrodes is a research hotspot in hole transport layer free perovskite solar cells[1-2].In this study,specific carbon spheres are synthesized using confined nanospace strategy,and then applied in perovskite solar cells as counter electrode.The perovskite solar cells fabricated using solid (SCS),hollow (HCS),open-ended (OCS) carbon sphere counter electrode achieve power conversion efficiency of 8.76%,9.17%,and 10.19%.The excellent activity of carbon sphere electrodes can be attributed to constructed stable multi-level network channel architecture of the carbon sphere layers,which can enhance the charge extract and transfer properties.Thus,the prepared carbon spheres are potential candidates to the noble metal counter electrodes.