The effect of Ni(CH3COO)2 post-treatment on the charge dynamics in p-type NiO dye-sensitized solar cells
- 363 Downloads
The present work reports a simple Ni(CH3COO)2 post-treatment method, meanwhile represents a series of characterizations of bare and post-treated NiO photocathodes. The investigation enlightens the mechanisms responsible for NiO surface changes and its effects on the charge density, band-edge shifts, hole injection efficiency, interface recombination, transport, collection efficiency, and as the result influence on the photovoltaic devices’ performance. The primary results demonstrate that Ni(CH3COO)2 post-treatment can offer an effective way of decreasing surface NiO(OH) structure, resulting in diminishing the hole recombination, increasing the charge collection efficiency, and leading to 31.3 % increased photovoltaic performance.
KeywordsPhotovoltaic Performance Hole Injection Charge Carrier Density Charge Collection Efficiency Interface Recombination
The authors acknowledge the support of National Natural Science Foundation of China (51302164, 51472154, 51202138 and 51202140), Natural Science Foundation of Shanghai (13ZR1417100, 12ZR1410500), Shanghai Municipal Science and Technology Commission (13DZ2292100), Baoshan District Science and Technology Commission of Shanghai (bkw2013142), Professional and Technical Service Platform for Designing and Manufacturing of Advanced Composite Materials, Shanghai, and East China University of Science and Technology.
- 9.Ting-Lung C, Chuen-Shii C, Der-Ho W, Chin-Min H (2011) Applications of p-type NiO in dye-sensitized solar cells. Adv Mater Res 239–242:1747–1750Google Scholar
- 10.Shi JF, Xu G, Miao L, Xu XQ (2011) P-type and pn-type dye-sensitized solar cells. Acta Phys Chim Sin 27:1287–1299Google Scholar
- 12.Peiris TA, Sagu JS, Wijayantha KG, Garcia-Canadas J (2014) Electrochemical determination of the density of states of nanostructured NiO films. ACS Appl Mater Interfaces 6:14988–14993Google Scholar