NH₂CH═NH₂PbI₃: An Alternative Organolead Iodide Perovskite Sensitizer for Mesoscopic Solar Cells

Abstract

A new nearly cubic NH 2 CHNH 2 PbI 3 (FAPbI 3 ) perovskite was synthesized for the mesoscopic solar cells. The measured band gap of bulk FAPbI 3 is 1.43 eV and it is therefore potentially superior than the CH 3 NH 3 PbI 3 (MAPbI 3 ) as the light harvester. A homogeneous FAPbI 3 perovskite layer was deposited on the TiO 2 surface by utilizing the in situ dipping technology. As a result, a high efficiency of 7.5% was achieved using P3HT as the hole transport material. The nearly cubic crystal structure and appropriate band gap render this new FAPbI 3 perovskite extremely attractive for next generation high-efficiency low-cost solar cells.

Electrostatic gating of hybrid halide perovskite field-effect transistors: balanced ambipolar transport at room-temperature

“…[10,11] The hybrid perovskites based on methylammonium (where A + = CH 3 NH 3 + ) are most common, but other organic cations, such as ethylammonium CH 3 CH 2 NH 3 + or formamidinium NH 2 CH = NH 2 + have also been explored. [12,13] It has been found that the anion (X = I, Br, Cl) impacts a variety of physical properties such as the crystal quality, [14] band-gap, [15] PV solar cell efficiency, [16] exciton-binding energy [17] and the amplified spontaneous emission wavelength.[8] Mixed halide perovskites such as CH 3 NH 3 PbI 3-x Cl x , offer the possibility of fine tuning the physical properties that result from optimized film morphology, [18] and, in general exhibit higher conductivities and longer carrier diffusion lengths. [4] The most exciting breakthroughs of hybrid halide perovskites are without a doubt in the area of PV technologies, where the new records in power conversion efficiencies have been reported at an unprecedented pace; in few years from the first report, the efficiency has improved by more than five times.…”

An X-ray scattering and electron microscopy study of methylammonium bismuth perovskites for solar cell applications

“…6,7 These materials typically employ Pb as the B cation, with halides such as Cl, I, and Br used as the X anion. Since 2009 organolead halide perovskites have become pioneer materials in the development of next-generation PV, [8][9][10][11] with initial power conversion efficiencies (PCEs) now standing at 22% for laboratory scale devices. 12 Among the challenges facing the scale-up of perovskite PV, the toxicity of the semiconductors has been raised as a potential issue owing to the presence of lead.…”

Fabrication of organic-inorganic perovskite thin films for planar solar cells via pulsed laser deposition

“…7,8,16,17 Various fabrication methods of the perovskite thin films have been reported to date. [18][19][20][21] The synthesis methods can be categorized into the one-step method (e.g. one-step precursor deposition 18 and dual-source vapor deposition 6 ) and the two-step method (e.g.…”

“…one-step precursor deposition 18 and dual-source vapor deposition 6 ) and the two-step method (e.g. the sequential deposition method 19 and vapor-assisted solution process 20 ). Compared to the one-step method, the two-step deposition is known to provide better control of the composition, the thickness, and the morphology of the organic-inorganic perovskite films, thus resulting in higher performance PSCs.…”