Hole‐Conductor‐Free Fully Printable Mesoscopic Solar Cell with Mixed‐Anion Perovskite CH₃NH₃PbI_(3−x)(BF₄)_x

Abstract

Mixed‐anion perovskite CH3NH3PbI(3−x)(BF4)x has been developed and optimized to enable a highly efficient hole‐conductor‐free fully printable mesoscopic solar cell. The employment of BF4− in hybrid organic–inorganic halide perovskite significantly improves its optical and electric properties, such as light harvesting ability, carrier concentration, and conductivity, leading to an enhanced power conversion efficiency of 13.24%.

The Emergence of the Mixed Perovskites and Their Applications as Solar Cells

“…Using this strategy, Han group also synthesized a series of mixed-anions MAPbI (3−x) (BF 4 ) x , and witnessed significant improved PCE in the resultant solar cells. [184] Taking this strategy forward, Nagane et al further completely replaced halide ions with BF 4 − , which obtained PVSK with the form of MAPb(BF 4 ) 3.…”

Solvent effect on the hole-conductor-free fully printable perovskite solar cells

“…In contrast, the corresponding values of the forward scan were 18.88 mA cm -2 , 906.31 mV, 0.76 and corresponding to PCE of 13.06%, which indicates no significant hysteresis.3.8 EIS analysisElectrochemical impedance spectroscopy (EIS) was performed in the dark under a forward bias of -0.6 V with the frequency range of 1 MHz to 100 mHz, and its corresponding Nyquist plots are depicted inFigure 6d. Because CH 3 NH 3 PbI 3 acts as both the light harvester and hole transporting material in HTM-free fully printable MPSC, there are only two RC elements representing charge transfer resistance and recombination at TiO 2 /perovskite and perovskite/CE interfaces, which corresponds to the second semicircle and the first semicircle respectively inFigure 6d [32,33]…”

Long term stability of air processed inkjet infiltrated carbon-based printed perovskite solar cells under intense ultra-violet light soaking

“…8,[12][13][14][15][16] As a result of these contributions, one class of PSCs i.e. carbon back contact based printable perovskite solar cells (CPSCs) [16][17][18][19] have emerged as a potential candidate which may be produced at low cost due to several factors. For instance the incorporated materials used in this device structure (i.e.…”

“…TiO 2 , ZrO 2 and carbon nanoparticles) are abundantly available and can be transformed into screen printable pastes and can also be easily stacked through established printing techniques such as screen printing. [16][17][18][19] Additionally, these CPSCs do not utilize the traditional costly hole transporting material (HTM) i.e. spiro-OMeTAD that, along with its additives, has also been identied as a major source of performance degradation during long term stability tests in traditional PSCs.…”