Journal Article

Efficient Hybrid Solar Cells Based on Meso-Superstructured Organometal Halide Perovskites

Murakami, Takurou N., Lee, Michael M., Teuscher, Joël, Miyasaka, Tsutomu, Snaith, Henry J.

2012

Overview

The energy costs associated with separating tightly bound excitons (photoinduced electron-hole pairs) and extracting free charges from highly disordered low-mobility networks represent fundamental losses for many low-cost photovoltaic technologies. We report a low-cost, solution-processable solar cell, based on a highly crystalline perovskite absorber with intense visible to near-infrared absorptivity, that has a power conversion efficiency of 10.9% in a single-junction device under simulated full sunlight. This \"meso-superstructured solar cell\" exhibits exceptionally few fundamental energy losses; it can generate open-circuit photovoltages of more than 1.1 volts, despite the relatively narrow absorber band gap of 1.55 electron volts. The functionality arises from the use of mesoporous alumina as an inert scaffold that structures the absorber and forces electrons to reside in and be transported through the perovskite.

• Publisher: American Association for the Advancement of Science,The American Association for the Advancement of Science
• Subject: Aluminum oxide / Applied sciences / Coating / Electric current / Electric potential / electric power / Electrodes / Electronics / Electrons / Energy / Energy conversion efficiency / Energy efficiency / Exact sciences and technology / Excitons / Halides / metals / nanoparticles / Natural energy / Optoelectronic devices / Oxides / Perovskites / Photovoltaic cells / Photovoltaic conversion / Photovoltaics / Power efficiency / Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices / Solar cells / Solar cells. Photoelectrochemical cells / Solar energy / Solar radiation / Thin films / Titanium dioxide / Voltage