An inverted planar solar cell with 13% efficiency and a sensitive visible light detector based on orientation regulated 2D perovskites

Abstract

A merged annealing process based high quality 2D perovskite film and the corresponding PVSC with a PCE beyond 13%.

The Second Spacer Cation Assisted Growth of a 2D Perovskite Film with Oriented Large Grain for Highly Efficient and Stable Solar Cells

“…Three‐dimensional (3D) hybrid perovskite solar cells (PVSCs) have experienced an unprecedented rise in power conversion efficiency (PCE) . Along with PCE exceeding 24 %, increasing attention has been paid to improve the environmental stability of the 3D perovskites for further practical application . Two‐dimensional (2D) Ruddlesden–Popper perovskite with chemical formula of A 2 B n −1 M n X 3 n +1 presents better moisture resistance than the 3D counterpart because of the advantages of enhanced hydrophobicity and higher forming energy …”

The Second Spacer Cation Assisted Growth of a 2D Perovskite Film with Oriented Large Grain for Highly Efficient and Stable Solar Cells

“…[1][2][3][4][5][6][7] Along with PCE exceeding 24 %, [8] increasing attention has been paid to improve the environmental stability of the 3D perovskites for further practical application. [9][10][11][12][13][14] Tw o-dimensional (2D) Ruddlesden-Popper perovskite with chemical formula of A 2 B nÀ1 M n X 3n+1 presents better moisture resistance than the 3D counterpart because of the advantages of enhanced hydrophobicity and higher forming energy. [15][16][17][18][19][20][21] Perovskite film with optimized orientation and grain size is desired in fabricating high-performance PVSCs.…”

Manipulation of Dipolar Polarization at Steady States for a Quasi‐2D Organic–Inorganic Hybrid Perovskite with a Nanorod Network

“…Table summarizes a few works with their photovoltaic parameters. In those, some particular treatments were adopted to improve the mobility and grain size of 2D perovskite films, for example, chlorination of organic ammonium salt, fluorination of PEA, and addition of an organic additive such as ammonium thiocyanate (NH 4 SCN) . Our quasi‐2D perovskite solar cell with high performance is indeed partly ascribed to the unique feature of the nanorod network.…”

“…The photoactive layer, quasi‐2D (PEA) 2 (MA) 3 Pb 4 I 13 , exhibits a large‐area nanorod network. The device produces a relatively high short‐circuit current of 18.4 mA cm −2 and an open‐circuit voltage ( V oc ) of 1.07 V at the same time, with a PCE of 14.1% by comparison with other works . In nondestructive impedance spectroscopy for in situ characterization at both steady states and short‐circuit‐current conditions, the quasi‐2D (PEA) 2 (MA) 3 Pb 4 I 13 shows remarkable photo‐ and electrical responses at some steady states under AC excitation frequencies.…”