Hole transport layers (HTLs) play a vital role in organic solar cells (OSCs).In this work,a derivative of tetrathiafulvalene with four carboxyl groups TrA was introduced as a novel HTL to fabricate OSC with high performance.Displaying a better energy level match between HTL and active layers,the TTA based devices show a peak power conversion efficiency of 9.09％,which is comparable to the devices based on PEDOT:PSS.The favorable surface morphology recorded via atomic force microscopy,low series loss and charge recombination indicated by electrochemical impedance spectroscopy,synchronously verify the ootential of TTA for application in OSCs as a valid kind of HTLs.