The Polymer Society of Korea

분자전자 부문위원회

포스터발표

Synergetic effect of two additives for air-processed anti-solvent-free perovskite solar cells

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For the air-processed anti-solvent-free perovskite solar cell, we adopted two additives, OAm(Oleylamine) and NH₄Cl. OAm is known as a linker molecule for preferential ordering of perovskite grains, and we expect a surface passivation effect due to the hydrophobic alkyl chains. NH₄Cl has been used as an additive to induce large grain growth of perovskite films. In this work, we applied both OAm and NH₄Cl to expect synergistic effects. To understand the effect, we conducted X-ray measurements. When using only OAm, vertically oriented (100) crystals were grown. With only NH₄Cl, the X-ray data were similar to the pristine film. However, when we applied both, we observed large grain with (100) preferential ordering. As an anti-solvent-free process, we used vacuum flash for solvent evaporation. With this method, we could obtain an efficiency of 19.3%(Cs_0.175FA_0.75MA_0.075Pb(I_0.875Br_0.125)₃, p-i-n structure device) in ambient air.

3PS-211

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