Details

Autor(en) / Beteiligte

• Yu, Yuan
• Xu, Peng
• Du, Huitian
• Zhou, Qian
• Wu, Yukun
• Hao, Yuying
• Ren, Junfeng
• Pang, Zhiyong
• Chen, Zhaolai
• Han, Shenghao

Titel

Surface Modification of NiOx Layer with Versatile Coupling Agent Enables Enhanced Performance and Stability of Inverted Perovskite Solar Cells

Ist Teil von

• Solar RRL, 2023-03, Vol.7 (6), p.n/a

Erscheinungsjahr

2023

Link zum Volltext

Quelle

Wiley Online Library Journals【キャンパス外アクセス可】

Beschreibungen/Notizen

• In recent years, nickel oxide (NiOx) is widely used as an excellent hole transport layer for the inverted perovskite solar cells (PSCs), due to its decent hole conductivity, easy processability, and low cost. However, the photovoltaic performance and stability of NiOx‐based PSCs are severely limited by the poor perovskite/NiOx interface. Herein, a versatile coupling agent di(dioctylpyrophosphato) ethylene titanate (NDZ‐311) is introduced to improve the performance of NiOx‐based inverted PSCs by suppressing nonradiative recombination and strengthening charge transfer at the perovskite/NiOx interface. Moreover, the chemical reaction between NDZ‐311 and NiOx reduces the surface hydroxyl groups of NiOx film and avoids direct contact between perovskite and NiOx film, which mitigate material degradation caused by high‐valence Ni ions and hydroxyl groups. As a result, the average power conversion efficiency (PCE) of inverted PSCs is enhanced from ≈18.01% to ≈19.92% and a maximum PCE of ≈20.39% is obtained. The unencapsulated PSC with NDZ‐311 modification maintains 87.65% of their initial performance after 400 h aging test in air, much better than the control device (49.41% after 400 h). The work demonstrates the potential application of NDZ‐311 for commercial PSCs, considering NDZ‐311 is a cheap industrial material. A versatile coupling agent di(dioctylpyrophosphato) ethylene titanate is used to modify the nickel oxide films, leading to reduced trap density, inhibited nonradiative recombination, strengthened charge transfer, and mitigated interface reaction in organic–inorganic halide perovskite polycrystalline thin films, which distinctly improve the device efficiency and moisture stability of inverted perovskite solar cells.