Introducing paired electric dipole layers for efficient and reproducible perovskite solar cells†,Energy & Environmental Science

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Introducing paired electric dipole layers for efficient and reproducible perovskite solar cells†
Energy & Environmental Science ( IF 32.4 ) Pub Date : 2018-05-07 00:00:00 , DOI: 10.1039/c8ee00162f
Jong-Hoon Lee _{1,

2,

3,

4,

5} , Junghwan Kim _{2,

3,

4,

5,

6} , Geunjin Kim _{2,

3,

4,

5,

6} , Dongguen Shin _{4,

7,

8,

9} , Song Yi Jeong _{2,

3,

4,

5,

6} , Jinho Lee _{1,

2,

3,

4,

5} , Soonil Hong _{1,

2,

3,

4,

5} , Jin Woo Choi _{2,

3,

4,

10} , Chang-Lyoul Lee _{2,

3,

4,

10} , Heejoo Kim _{2,

3,

4,

11} , Yeonjin Yi _{4,

7,

8,

9} , Kwanghee Lee _{1,

2,

3,

4,

5}

Affiliation

Elimination of charge trapping at defects is highly challenging for poly-crystalline organometal halide perovskites. Here, we report a new architecture for reinforcing the built-in electric field (E_in) across the photoactive layer with a pair of strong electric dipole layers (EDLs). The paired EDLs significantly intensify the E_in across the perovskite layer, resulting in suppressed charge trapping of photogenerated charges. As a result, our low-temperature processed P–I–N planar PeSC devices using the paired EDLs exhibit a higher power conversion efficiency (η_max ∼ 19.4%) and a smaller device-to-device variation with a standard deviation (S.D.) of 0.70%, which far surpass those (η_max ∼ 17.8%, S.D. ∼ 1.1%) of the devices with typical charge transport layers.

中文翻译：

引入成对的电偶极子层，可实现高效且可重现的钙钛矿型太阳能电池†

对于多晶有机金属卤化物钙钛矿而言，消除缺陷处的电荷俘获具有很高的挑战性。在这里，我们报告了一种新架构，该架构使用一对强电偶极层（EDL）增强了跨光敏层的内置电场（E _in）。成对的EDL显着增强了钙钛矿层中的E _in，从而抑制了光生电荷的电荷俘获。其结果是，我们的低温处理采用配对的EDL表现出更高的功率转换效率P-I-N平面PESC设备（η_最高〜19.4％）和较小的设备到设备的变化，标准偏差（SD）的0.70％，这远超过那些（η_最大具有典型电荷传输层的器件约占17.8％，SD约占1.1％）。

更新日期：2018-05-07

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