Largely enhanced V OC and stability in perovskite solar cells with modified energy match by coupled 2D interlayers

The performance of perovskite solar cells is largely enhanced by modifying the energy match of electrodes with coupled 2D interfacial layers. The V OC is about 0.17 V increased to 1.135 V and 1.176 V for the CH 3 NH 3 PbI 3 and CH 3 NH 3 PbI 2.5 Br 0.5 based devices, respectively. The PCE of the PEDOT:PSS based p–i–n solar cells is up to 19.14%.