Solar Energy & Advanced Materials Research Group


New Paper in Angewandte Chemie

19 May 2017

 We are pleased to announce a new paper entitled "Nanojunction polymer photoelectrode for efficient charge transport and separation" Published by our group member Qiushi Ruan et.

Angew s-b-CN al and our collaborator in Department of Chemistry Prof. Claire Carmalt in Angewandte Chemie.

It is now available online: Angew. Chem. Int. Ed. 10.1002/anie.201703372; Angew. Chem. 10.1002/ange.201703372


A novel nanojunction archiecture of metal-free photoanode, composed of B-doped carbon nitride nanolayer and bulk carbon nitride has been fabricated by a one-step construction approach. This type of nanojunction overcomes a few intrinsic drawbacks of carbon nitride film, e.g. severe bulk charge recombination and slow charge transfer. For the optium sample, the top layer of the nanojunction has a depth of ca. 100 nm and the bottom layer is ca. 900 nm. The nanojunction photoanode results into a 10 fold higher photocurrent than bulk graphitic carbon nitride and an extremely high incident photon-to-current efficiency (IPCE) of ca. 10% at 400 nm, which to the best of our knowledge is the highest for G-CN based polymer photoanodes in the absence of any sacrificial reagents. The EIS, MS and IMPS spectroscopies all prove such enhancement is mainly due to more than 10 times faster charge seperation rate and nearly 3 times higher conductivity due to the nanojunction architcutre.