A novel quadruple-cation absorber for universal hysteresis elimination for high efficiency and stable perovskite solar cells

Photovoltaics literature survey (no. 149)

Photovoltaics literature survey (No. 181)

Low temperature processed ternary oxide as an electron transport layer for efficient and stable perovskite solar cells

Lead-free tin perovskite solar cells

The electron transport layer is very important for the device efficiency and stability of perovskite solar cells. Tin dioxide is a common electron transport layer in high-efficiency solar cells and has good carrier extraction and transport capability. However, using the solution method to prepare tin dioxide, a large number of defects are generated on its surface during high-temperature annealing in air, which can degrade the electrical properties of the film, so the solution method is not conducive to preparing large-area film. In this paper, the reactive plasma deposition method is used to prepare tin dioxide thin film, and the performance of the thin film is optimized by adjusting the glow discharge time and working current. The film is applied to small-area N-I-P type perovskite solar cells, the efficiency reaching to 21.24%. The hysteresis of the device is improved by introducing stannous isooctanoate and tin dioxide as a double electron transport layer, the open circuit voltage of the solar cell increases from 1.11 to 1.15 V, the efficiency rises from 21.27% to 22.15%, and the hysteresis factor decreases from 24.04% to 3.69%. This work presents a new preparation method and effective optimization strategy to prepare tin dioxide electron transport layer, which will promote the development of planar heterojunction perovskite solar cells and provide a new research idea for preparing high-efficiency and stable perovskite solar cells.

Interface engineering with NiO nanocrystals for highly efficient and stable planar perovskite solar cells

Hole and electron transport materials: A review on recent progress in organic charge transport materials for efficient, stable, and scalable perovskite solar cells

The interfaces of each layer in perovskite solar cells (PSCs) are critical factors for efficient and stable perovskite solar cells (PSCs). Especially, poor contact characteristics between perovskite and the electron transport layer in n-i-p-type PSCs significantly affect the carrier dynamics at the buried interface, hindering further improvement in the performance of devices. Herein, we propose a novel codeposition strategy based on (4-bromophenyl) phosphonic acid, which effectively passivates interface and improves the morphology of perovskites, achieving a power conversion efficiency of 24.9%. A part of the molecules spontaneously bond to tin dioxide and act as bridging molecules to connect the tin dioxide layer and perovskite layer during the absorber layer spin-coating process. The phosphonic acid groups and bromine atoms effectively fill oxygen vacancies in tin dioxide and halogen vacancies in the perovskite film. The deprotonated molecules passivate uncoordinated lead defects as passivating agents. The high-efficiency PSCs retained 81% of initial efficiency under ISOS-L-1 MPP tracking for 300h. This approach provides new insights into the interface passivation strategy to realize low-cost and efficient PSCs.

Decoupling the effects of defects on efficiency and stability through phosphonates in stable halide perovskite solar cells

An in-situ defect passivation through a green anti-solvent approach for high-efficiency and stable perovskite solar cells

High efficient and long-time stable planar heterojunction perovskite solar cells with doctor-bladed carbon electrode

Electrospray deposited MoS2 nanosheets as an electron transporting material for high efficiency and stable perovskite solar cells

Reduce the hysteresis effect with the PEIE interface dipole effect in the organic-inorganic hybrid perovskite CH3NH3PbI3-xClx solar cell

Polymer strategies for high-efficiency and stable perovskite solar cells

High-performance methylammonium-free ideal-band-gap perovskite solar cells