Loading Dependent Electrical Properties of Hybrid Perovskite Composite Media
- PDF / 1,009,860 Bytes
- 8 Pages / 612 x 792 pts (letter) Page_size
- 42 Downloads / 237 Views
Loading Dependent Electrical Properties of Hybrid Perovskite Composite Media John P. Murphy1, 2 ,Jessica M. Andriolo1,3,Nathan J. Sutton1,4, Gary Wyss5 and Jack L. Skinner1,2,4 1
Montana Tech Nanotechology Laboratory, 1300 W. Park Street, Butte, MT 59701, U.S.A. Materials Science PhD Program, Montana State University System, U.S.A. 3 Individual Interdisiplinary PhD Program, 32 Campus Drive, University of Montana, Missoula 59812, MT, U.S.A. 4 Mechanical Engineering Department, Montana Tech, 1300 W. Park Street, Butte, MT 59701, U.S.A. 5 Center for Advanced Mineral and Metallurgical Processing, Montana Tech, Butte, MT 59701, U.S.A. 2
ABSTRACT Hybrid organic-inorganic perovskites (HOIPs) have been previously compounded with hydrophobic polymers in order to improve the resilience of HOIPs in humid environments. In this study HOIP particles were synthesized and dispersed into a polymer solution. The weight loading of the HOIP phase in the composite was increased until an abrupt change in the electrical conduction was observed indicating a percolation threshold was approached. Additionally, the CH3NH3PbI3/ polystyrene composite media was characterized to assess morphology and the effect it has on the observed electrical properties. INTRODUCTION Hybrid organic-inorganic perovskites (HOIPs) are potentially an industry disruptive absorber material in the manufacture of solar cells. With efficiencies already on par with current thin-film solar cell technology [1] and significantly lower manufacturing costs [2], HOIP photovoltaics represent the next generation of solar cell technology. A significant barrier to marketplace entry is in the inherent instability in the HOIP material, which significantly reduces device lifetime and makes it difficult to reach cost-payback time of any device produced. The instability arises primarily from exposure to humidity. When exposed to any amount of liquid water, condensation for example, the HOIP undergoes irreversible degradation [3]. In order to address the humidity driven degradation of HOIP materials, several techniques have been implemented, such as encapsulation with hydrophobic layer [4], varying HOIP chemistry [5], and the formation of composites [6]. HOIP composites would have improved processability over typical solution processing techniques with a greater degree of control over the mechanical properties of absorber layers. Robustness of the material would increase as well lending itself to low-cost flexible solar cells traditionally made from low-efficiency light-absorbing polymers. Furthermore, any developments made at the research scale could be easily scaled-up to a manufacturing scale through pre-existing bulk composite processing techniques. Currently, HOIP composite are only used in light-emitting applications [7] or if used in a solar cell absorbing layer are composited with conjugated or photoactive polymers [8] increasing the cost per area of solar cells. In order to realize useful implementation of HOIP/hydrophobic, low-cost polymer composites, the electrical properti
Data Loading...
