Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 120, Issue 13, Pages 6996-7004Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpcc.6b00309
Keywords
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Funding
- National Natural Science Foundation of China [11334014, 61475109, 61274056]
- Program for New Century Excellent Talents in University [NCET-13-0598]
- Hunan Provincial Natural Science Foundation of China [2015JJ1015]
- Project of Innovation driven Plan in Central South University [2015CXS036]
- National Science Foundation [CBET-1437656]
- Div Of Chem, Bioeng, Env, & Transp Sys
- Directorate For Engineering [1437656] Funding Source: National Science Foundation
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Highly efficient planar heterojunction (PHJ) perovskite solar cells (PSCs) with a structure of ITO/PEDOT:PSS/CH3NH3PbI3/PCBM/Al were fabricated by a low-temperature solution process. As employed silica-coated gold (Au@SiO2) nanorods at the interface between the hole transport layer PEDOT:PSS and the active layer CH3NH3PbI3, the average power conversion efficiency (PCE) showed over 40% enhancement, of which the average PCE was improved from 10.9% for PHJ-PSCs without Au@SiO2 to 15.6% for PHJ-PSCs with Au@SiO2, and the champion one up to 17.6% was achieved. Both experiment and simulation results proved that prominent efficiency enhancement comes from the localized surface plasmon resonance of Au@SiO2 nanorods which could improve the incident light trapping as well as improve the transport and collection of charge carrier, resulting in the enhancement in device parameters. The results suggest that metal nanorods, e.g., Au@SiO2, could be employed toefficiency and low-cost PHJ-PSCs.
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