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Combined Stress Testing of Perovskite Solar Cells for Stable Operation in Space

ACS Applied Energy Materials American Chemical Society (ACS) 6:20 (2023) 10319-10326

Authors:

Kaitlyn T VanSant, Ahmad R Kirmani, Jay B Patel, Laura E Crowe, David P Ostrowski, Brian M Wieliczka, Michael D McGehee, Laura T Schelhas, Joseph M Luther, Timothy J Peshek, Lyndsey McMillon-Brown

Benzylamine Passivation of Wide-Bandgap Perovskite

Fundacio Scito (2023)

Authors:

Suer Zhou, Henry Snaith, Yangwei Shi, Joel Smith, James Drysdale, Benjamin Gallant, Margherita Taddei, Harry Sansom, Junxiang Zhang, Stephen Barlow, Akash Dasgupta, Ashley Marshall, Jian Wang, David Ginger, Seth Marder, Declan McCarthy

Compact-porous hole-transport-layer for highly efficient near-infrared region transparent perovskite solar cells for tandem applications

Journal of Alloys and Compounds 960 (2023)

Authors:

B Tyagi, N Kumar, HB Lee, YM Song, S Cho, JS Lee, JW Kang

Abstract:

Wide-bandgap perovskites solar cells (PSCs) are vital as top cells in perovskite-based tandem solar cells (TSCs). However, poor band alignment with the charge transport layer and unwanted parasitic absorption in the top semitransparent-PSC (ST-PSC) are major factors limiting the power conversion efficiency (PCE) of TSCs. Herein, we present a compact-porous nickel oxide (cp-NiOx) hole-transport layer (HTL) sequentially fabricated using a sol-gel suspension and colloidal suspension of highly crystalline NiOx. The cp-NiOx film exhibited enhanced transparency, mesoporous surface morphology, and better energy band alignment with a 1.68 eV perovskite film for fabricating highly near-infrared transparent (∼92 % (@800–1200 nm)) ST-PSCs. The best cell achieved a PCE of 15.9 %. In addition, a four-terminal perovskite/silicon TSC based on the cp-NiOx HTL achieved an outstanding PCE of ∼26.0 %. The tailored energy band structure and reduced parasitic absorption in the near-infrared region of the ST-PSCs based on the cp-NiOx HTL enabled fabrication of highly efficient inverted ST-PSCs for perovskite/silicon TSCs.

Stabilizing non-IPR C2(13333)-C74 cage with Lu2C2/Lu2O: the importance of encaged non-metallic elements

Chemical Communications Royal Society of Chemistry (RSC) (2023)

Authors:

Pengwei Yu, Mengyang Li, Shuaifeng Hu, Changwang Pan, Wangqiang Shen, Kun GUO, Yun-Peng Xie, Lipiao Bao, Rui Zhang, Xing Lu

Abstract:

The difference in encaged non-metallic element (i.e., C2 versus O) leads to clear change of intramolecular interactions and shifts in redox potentials of Lu2C2@C2(13333)-C74 and Lu2O@C2(13333)-C74, as a result of...

Hydrogen bond-assisted dual passivation for blue perovskite light-emitting diodes

ACS Energy Letters American Chemical Society 8:10 (2023) 4296-4303

Authors:

Zhongkai Yu, Xinyu Shen, Xiangyang Fan, Young-Kwang Jung, Woo Hyeon Jeong, Akash Dasgupta, Manuel Kober-Czerny, Pietro Caprioglio, Sung Heum Park, Hyosung Choi, Henry J Snaith, Samuel D Stranks, Bo Ram Lee

Abstract:

Although significant progress has been made in the development of green, red, and near-infrared perovskite light-emitting diodes (PeLEDs), blue PeLEDs exhibit inferior performance, owing to various defects and poor carrier injection in solution-processed perovskite films. Thus, this study incorporates dual-passivation additive diphenylphosphinamide (DPPA) into perovskite films, and through density functional theory calculations and experimental characterizations, DPPA has been proven to be an effective passivator. Its phosphine oxide group coordinates with unsaturated lead ions, passivating perovskite defects, while the amino group forms hydrogen bonds with adjacent halide ions, suppressing their migration and further strengthening the passivation effect. Blue quasi-two-dimensional PeLEDs based on DPPA-modified perovskite films achieved an external quantum efficiency of 12.31% with an emission peak at 486 nm. Moreover, the device operational lifetime was extended by 32% with more stable spectra owing to the decreased defect density and suppressed ion migration in the perovskite film.