Enhanced photovoltage and stability of perovskite photovoltaics enabled by a cyclohexylmethylammonium iodide-based 2D perovskite passivation layer

Abstract

Regardless of the impressive progress that perovskite solar cells (PSCs) have achieved, especially considering their power conversion efficiency (PCE) over 25%, traditional PSCs still contend with an inherent instability with...

Spacer-Dependent and Pressure-Tuned Structures and Optoelectronic Properties of 2D Hybrid Halide Perovskites

“…12 In addition, CMA 2 PbI 4 (n = 1) has been used as a capping layer in 3D/ 2D perovskite solar cells that exhibit much higher chemical stability because of the more hydrophobic surface of the CMA. 11,16 The desirable optical properties of CMA 2 PbI 4 , such as photoluminescence (PL) emission at 536 nm with long carrier lifetimes and high PL quantum yield, are suitable for optoelectronic device applications, such as light emitting diodes. 14,15 On the basis of these intrinsic properties, CMA 2 PbI 4 is a promising candidate for further structural tuning and performance optimization.…”

“…Among various 2D HOIPs reported so far, CMA-based 2D RP perovskites (CMA) 2 (MA) n −1 Pb n I 3 n +1 , where CMA is cyclohexylmethylammonium (C 6 H 11 CH 2 NH 3 + ) and MA is methylammonium (CH 3 NH + ), have received recent attention for photovoltaic applications. − Excellent solar cell efficiency has been demonstrated with CMA-based 2D perovskite materials of higher n values . In addition, CMA 2 PbI 4 ( n = 1) has been used as a capping layer in 3D/2D perovskite solar cells that exhibit much higher chemical stability because of the more hydrophobic surface of the CMA. , The desirable optical properties of CMA 2 PbI 4 , such as photoluminescence (PL) emission at 536 nm with long carrier lifetimes and high PL quantum yield, are suitable for optoelectronic device applications, such as light emitting diodes. , On the basis of these intrinsic properties, CMA 2 PbI 4 is a promising candidate for further structural tuning and performance optimization.…”

Space‐Resolved Photoresponse in Quasi‐Two‐Dimensional Ruddlesden–Popper Perovskites

“…[35] Also, the 2D/3D hybrid perovskite, of which 2D phases are distributed at the GBs of the 3D phase structured perovskite is achieved. [70,71] Overall, further understanding of the optoelectronic properties of 2D perovskites will not only help us improve the performance of PeSCs but also accelerate the widespread application of 2D perovskite devices.…”

Luminescence and Dielectric Switchable Properties of a 1D (1,1,1-Trimethylhydrazinium)PbI3 Hybrid Perovskitoid

“…Similar to perovskites, perovskitoids also have interesting physicochemical properties that are important for optoelectronics. − One of them is the improvement of the application properties of perovskite solar cells (PSCs). − Despite many advantages of the commonly used MAPbI 3 and FAPbI 3 (MA + = methylammonium cation; FA + = formamidinium cation), such as low-production costs and high-power conversion efficiency, PSCs have relatively low intrinsic stability. One of the suggested ways to boost photovoltaic properties of PSCs is the passivation of the surface with other 1D perovskitoids templated by bulky ammonium cations, like diethyl-(2-chloroethyl)­ammonium, cyclohexylmethylammonium, or methyl-1,3-propanediammonium …”

“…15−17 Despite many advantages of the commonly used MAPbI 3 and FAPbI 3 (MA + = methylammonium cation; FA + = formamidinium cation), such as low-production costs and high-power conversion efficiency, PSCs have relatively low intrinsic stability. One of the suggested ways to boost photovoltaic properties of PSCs is the passivation of the surface with other 1D perovskitoids templated by bulky ammonium cations, like diethyl-(2-chloroethyl)ammonium, 16 cyclohexylmethylammonium, 18 or methyl-1,3-propanediammonium. 15 In recent years, hybrids templated by the hydrazinium cation 19 and its derivatives, such as methylhydrazinium [8][9][10][11]20 or 1,1-dimethylhydrazinium, 21,22 have received attention.…”