PDAI2 Jiuyao Selection

1、 Product Introduction:

Product Name:PDAI2，1,3-Diaminopropane diHIacid salt

CASnumber:120675-53-8

Color characteristics:white powder

Product purity:≥98%

Packing Specification:1gThe3gBrown glass bottle packaging

Storage method:Suggest storing in a glove box filled with nitrogen gaslight-proofTo maintain its stability and performance.

2、 Application and characteristics in perovskite solar cells:

Optimizing the crystal quality of perovskite thin films can effectively adjust the energy level matching between the perovskite layer and the charge transport layer, thereby improving the energy conversion efficiency and stability of solar cells.

purpose

1buildDion Jacobson (DJ) type two-dimensional perovskite structure

oStrong interlayer connection：
Diamino cation (such asDAP²⁺）By electrostatic interaction with perovskite inorganic layers (such as[PbI₆]⁴⁻）Form a tight bondDJ type two-dimensional structure significantly reduces van der Waals gaps and suppresses iodide ions (I)⁻）Migration and phase separation.

oStability improvement：
compared toRuddlesden Popper (RP) type structure, DJ type perovskite at high temperatures (>85 ° C)℃）Under illumination, it exhibits better phase stability and delays the degradation of device performance.

2Grain boundaries and surface passivation

oDefect repair：
Diamino group（-NH₃⁺）Can simultaneously combine with uncoordinated perovskite surfacesPb²⁺andI⁻Defects reduce non radiative recombination centers and improve carrier lifetime.

oGrain boundary optimization：
inA 2D/3D heterojunction is formed at the grain boundaries of 3D perovskite, reducing grain boundary resistance and improving charge transfer efficiency.

3Inhibit ion migration

oPhysical barrier effect：
The DJ type two-dimensional layer blocks the internal ions of perovskite (such as I) through a tightly stacked structure⁻TheFA⁺）The migration path reduces the risk of electrochemical corrosion and phase transition at the interface.

IIIcharacteristic

1structural advantage

oEfficient passivation of diamines：
Double amino provides more binding sites, enhances the interaction with perovskite defects, and has a better passivation effect than single amino passivators (such as...)PEAI）。

oInorganic interlayer strong bonding：
The DJ type structure connects inorganic layers by sharing iodine ions, improving mechanical and thermal stability.

2performance improvement

oEfficiency enhancement：
By suppressing recombination and optimizing charge transfer, the open circuit voltage of typical devices（VOCVOC）Can be upgraded toAbove 1.2 V, the photoelectric conversion efficiency (PCE) exceeds 25%.

oOutstanding stability：

§Humidity stability: InUnder 85% RH environment, the lifespan of unpackaged devices exceeds 1000 hours.

§thermal stability：85℃Retained after aging90% initial efficiency, far superior to traditional 3D perovskite.