All-Porphyrin Photovoltaics with Power Conversion Efficiency of 7.2%

Abstract

In this Letter, two zinc porphyrin small molecules D1 and A1 with different functional groups have been employed as the donor and acceptor, respectively, for the construction of all-porphyrin photovoltaics (APPs). The strong electron-donating phenylamino moiety ensures the D1 small molecule with a high-lying highest occupied molecular orbital energy level aligns a cascade energy level with the A1 small molecule, accomplishing the driving force for exciton dissociation and prompting intermolecular π−π stacking to ameliorate the intermolecular charge transport. Meanwhile, good complementary absorptions between D1 donor and A1 acceptor greatly contribute to harvesting more solar flux. For the optimized devices, 1:0.5 D1:A1 device delivered a relatively high power conversion efficiency of 7.21% with an open-circuit voltage of 0.76 V, a short-circuit current density of 14.43 mA cm −2 , a fill factor of 65.7%, and a small energy loss of 0.61 eV.

Synergistic Engineering of Natural Carnitine Molecules Allowing for Efficient and Stable Inverted Perovskite Solar Cells

“…The dependence of the photocurrent density ( J ph ) on the effective voltage ( V eff ) was recorded under 1 sun condition to determine the charge generation and extraction processes (Figure d) . The J ph value increases more significantly as V eff increases in the carnitine-modified PSC, indicating more effective charge carrier extraction.…”

The Effect of Miscibility and Morphology of Porphyrin Donors and Non‐Fullerene Acceptors on Exciton Dissociation Processes: A Quantum Chemical and Molecular Dynamics Study

“…Due to porphyrins can act as both donor and acceptor materials, the appearance of all porphyrin OSCs shows the breakthrough progress and opens up new avenue to explore the application of porphyrin dyes in the field of OSCs. However, the maximum efficiency of all porphyrin OSC was only 7.2 % [24] . The devices based on this combination also remain relatively unexplored, the reason for which still needs to be further investigated [25] .…”

“…However, the maximum efficiency of all porphyrin OSC was only 7.2 %. [24] The devices based on this combination also remain relatively unexplored, the reason for which still needs to be further investigated. [25] Even if the combination of porphyrins and NFAs can reduce the high miscibility, adverse morphology such the large phase separation also causes the devices based on porphyrins and NFAs to be relatively underdeveloped, making it difficult to further improve the performance.…”

Optical and Electrophysical Properties of Vinylidene Fluoride/Hexafluoropropylene Ferroelectric Copolymer Films: Effect of Doping with Porphyrin Derivatives

“…Among the numerous dyes, porphyrin derivatives are widely used as photosensitizers due to their outstanding photophysical properties. The combination of the intense absorption in the visible spectral range and pronounced fluorescence and photochemical activity, resulting in the photoinduced generation of different reactive oxygen species, makes porphyrin derivatives efficient photovoltaic dyes [ 13 , 14 , 15 , 16 , 17 ], optical sensors, and fluorescent imaging agents [ 18 , 19 , 20 , 21 ], and efficient visible light photocatalysts [ 22 , 23 ] and photosensitizers in photodynamic therapy [ 24 , 25 , 26 , 27 , 28 ].…”