Journal
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
Volume 403, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jphotochem.2020.112843
Keywords
Perovskite solar cells; Carbon counter electrode; HTL-free; Photovoltaic property
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Funding
- National Natural Science Foundation of China [21676040]
- Natural Science Foundation of Liaoning Province [20170540086]
- open fund of the State Key Laboratory of Molecular Reaction Dynamics in DICP, CAS [SKLMRD-K201913, K20180]
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A carbon nanotubes (CNTs)/carbon fiber (Cf) has been prepared and used as a counter electrode (CE) for hole-transport-material-free perovskite solar cells (PSCs). It was found that CNTs/Cf material effectively increased the contact area between pemvskite and carbon layer, correspondingly decreased the charge exchange resistance and enhanced hole extraction ability at pemvskite/CE interface. In addition, hole transfer in CNTs/Cf CE was accelerated due to the existence of highway hole transfer path derived from CNTs/Cf structure, which reduced photoluminescence peak intensity. As a result, the PSC based on CNTs/Cf CE with high-efficiency hole extraction ability and fast hole transfer performance had a high power conversion efficiency (PCE) of 11.80 % compared with that of CNTs CE (8.93 %) and Cf CE (7.47 %).
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