Reduction of intrinsic defects in hybrid perovskite films via precursor purification,Chemical Communications

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Reduction of intrinsic defects in hybrid perovskite films via precursor purification
Chemical Communications ( IF 4.9 ) Pub Date : 2017-08-31 00:00:00 , DOI: 10.1039/c7cc05590k
Deliang Zhang _{1,

2,

3,

4} , Bin-Bin Cui _{2,

3,

4,

5} , Chenxiao Zhou _{1,

2,

3,

4} , Liang Li _{1,

4,

6,

7,

8} , Yihua Chen _{1,

4,

6,

7,

8} , Ning Zhou _{1,

4,

6,

7,

8} , Ziqi Xu _{1,

4,

6,

7,

8} , Yujing Li _{1,

2,

3,

4} , Huanping Zhou _{1,

4,

6,

7,

8} , Qi Chen _{1,

2,

3,

4}

Affiliation

A simple chemical process was developed in a scalable manner, to reduce trap states in perovskite absorbers from the very beginning. The obvious decrease of I₂ in methylammonium iodide and the decrease of trap density in the resultant films were identified, which led to the power conversion efficiency (PCE) of perovskite solar cells (PSCs) increase from 16.5% to 18.5%.

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