Perovskite solar cell

About: Perovskite solar cell is a research topic. Over the lifetime, 4701 publications have been published within this topic receiving 216807 citations. The topic is also known as: PSC.

17.6% stabilized efficiency in low-temperature processed planar perovskite solar cells

Abstract: We present here a planar perovskite solar cell with a stabilized power conversion efficiency (PCE) of 17.6% at the maximum power point and a PCE of 17% extracted from quasi-static J–V with an open-circuit voltage of 1.11 V. Such excellent figures of merit can be achieved by engineering a solution-processed electron buffer layer that does not require high temperature steps. A compact thin film of perovskite absorber is grown onto a PCBM-based electron extraction layer by implementing a novel two-step procedure which preserves the soluble organic interlayer during the deposition of successive layers. We demonstrate that efficient charge extraction is the key for high steady state efficiency in perovskite solar cells with a highly integrable architecture.

Perovskite/silicon tandem solar cells: marriage of convenience or true love story? - An overview

Abstract: Perovskite/silicon tandem solar cells have reached efficiencies above 25% in just about three years of development, mostly driven by the rapid progress made in the perovskite solar cell research field. This review aims to give an overview of the achievements made in this timeframe toward the goal of developing high-efficiency perovskite/silicon tandem cells with sufficiently large area and long lifetime to be commercially interesting. The developments that led to the recent progress in tandem cell efficiency, as well as the fac-tors currently still limiting their performance, including parasitic absorption, reflection losses, and the nonideal perovskite absorber layer bandgap, are discussed. Based on this discussion, guidelines for future developments are given. In addition, crucial aspects to enable the commercialization of pero-vskite/silicon tandem solar cells are reviewed, such as device stability and upscaling. Finally, economic considerations show how the number of steps and/or the costs associated to these steps for realizing the perovskite cell must be kept to a minimum to keep up with progress in the field of silicon photovoltaics.

Strontium-Doped Low-Temperature-Processed CsPbI2Br Perovskite Solar Cells

Abstract: Cesium (Cs) metal halide perovskites for photovoltaics have gained research interest due to their better thermal stability compared to their organic–inorganic counterparts. However, demonstration of highly efficient Cs-based perovskite solar cells requires high annealing temperature, which limits their use in multijunction devices. In this work, low-temperature-processed cesium lead (Pb) halide perovskite solar cells are demonstrated. We have also successfully incorporated the less toxic strontium (Sr) at a low concentration that partially substitutes Pb in CsPb1–xSrxI2Br. The crystallinity, morphology, absorption, photoluminescence, and elemental composition of this low-temperature-processed CsPb1–xSrxI2Br are studied. It is found that the surface of the perovskite film is enriched with Sr, providing a passivating effect. At the optimal concentration (x = 0.02), a mesoscopic perovskite solar cell using CsPb0.98Sr0.02I2Br achieves a stabilized efficiency at 10.8%. This work shows the potential of inorgani...

Orientation Regulation of Phenylethylammonium Cation Based 2D Perovskite Solar Cell with Efficiency Higher Than 11

Abstract: DOI: 10.1002/aenm.201702498 with chemical formula of A2Bn−1MnX3n+1 (n ≥ 2), wherein M is Pb2+ or Sn2+, B is CH3NH3 (MA+), HC(NH2)2 (FA+), or Cs+, A is the spacer cation including CH3(CH2)2NH3 (BA+), C6H5(CH2)2NH3 (PEA+), etc., have been developed and applied as the light-harvesting layer in PVSCs.[18–24] The usage of the spacer cation favors the formation of stable 2D perovskite, but the related device efficiency decreases rapidly. The partial replacement of MA+ with the spacer cations leads to the anisotropy in crystal structure and subsquently anisotropic charge carriers transportation. As a result, the movement of the charge carriers in 2D perovskite is blocked by the insulating spacer cation layer.[20] It is considered as one of the main reasons why 2D perovskite-based PVSCs show a much lower PCE than 3D-based PVSCs, for example, 4.73% for (PEA)2(MA)n−1PbnI3n+1 and 4.02% for (BA)2(MA)n−1PbnI3n+1 with n = 3. To improve the PCE of the 2D-based PVSCs, researchers tried to reduce the insulating effects of the organic layer by increasing the n value. Mora-Seró and coworkers[27] fabricated (C6H5NH3I)2(CH3NH3I)n−1(PbI2)n film on compact TiO2/mesoporous TiO2 substrate and obtained PCEs from 0.66% (n = 1) to 5.94% (n = 5). Sargent and co-workers[28] prepared (PEA)2(MA)n−1PbnI3n+1 perovskite on dense compact TiO2 substrate and achieved the highest PCE of 15.3% in the case of n = 60. But the PCE reduced to 9.22% with decreasing n to 6 due to the wide bandgap and poor carrier transport. Etgar and co-workers[29] fabricated (PEA)2(MA)n−1PbnBr3n+1 based Increasing the power conversion efficiency (PCE) of the two-dimensional (2D) perovskite-based solar cells (PVSCs) is really a challenge. Vertical orientation of the 2D perovskite film is an efficient strategy to elevate the PCE. In this work, vertically orientated highly crystalline 2D (PEA)2(MA)n–1PbnI3n+1 (PEA= phenylethylammonium, MA = methylammonium, n = 3, 4, 5) films are fabricated with the assistance of an ammonium thiocyanate (NH4SCN) additive by a one-step spin-coating method. Planar-structured PVSCs with the device structure of indium tin oxide (ITO)/poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)/ (PEA)2(MA)n–1PbnI3n+1/[6,6]-phenyl-C61-butyric acid methyl ester /bahocuproine/ Ag are fabricated. The PCE of the PVSCs is boosted from the original 0.56% (without NH4SCN) to 11.01% with the optimized NH4SCN addition at n = 5, which is among the highest PCE values for the low-n (n < 10) 2D perovskitebased PVSCs. The improved performance is attributed to the vertically orientated highly crystalline 2D perovskite thin films as well as the balanced electron/ hole transportation. The humidity stability of this oriented 2D perovskite thin film is also confirmed by the almost unchanged X-ray diffraction patterns after 28 d exposed to the moisture in a humidity-controlled cabinet (Hr = 55 ± 5%). The unsealed device retains 78.5% of its original PCE after 160 h storage in air atmosphere with humidity of 55 ± 5%. The results provide an effective approach toward a highly efficient and stable PVSC for future commercialization. Perovskite Solar Cells