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Extending the Photovoltaic Response of Perovskite Solar Cells into the Near-Infrared with a Narrow-Bandgap Organic Semiconductor.
Zhao, Xiaoming; Yao, Chao; Liu, Tianran; Hamill, J Clay; Ngongang Ndjawa, Guy Olivier; Cheng, Guangming; Yao, Nan; Meng, Hong; Loo, Yueh-Lin.
Afiliación
  • Zhao X; Department of Chemical and Biological Engineering, Princeton University, Princeton, NJ, 08544, USA.
  • Yao C; Department of Chemical and Biological Engineering, Princeton University, Princeton, NJ, 08544, USA.
  • Liu T; School of Advanced Materials, Peking University Shenzhen Graduate School, Shenzhen, 518055, China.
  • Hamill JC; Department of Chemical and Biological Engineering, Princeton University, Princeton, NJ, 08544, USA.
  • Ngongang Ndjawa GO; Department of Chemical and Biological Engineering, Princeton University, Princeton, NJ, 08544, USA.
  • Cheng G; Department of Chemical and Biological Engineering, Princeton University, Princeton, NJ, 08544, USA.
  • Yao N; Princeton Institute for Science and Technology of Materials, Princeton University, Princeton, NJ, 08544, USA.
  • Meng H; Princeton Institute for Science and Technology of Materials, Princeton University, Princeton, NJ, 08544, USA.
  • Loo YL; School of Advanced Materials, Peking University Shenzhen Graduate School, Shenzhen, 518055, China.
Adv Mater ; 31(49): e1904494, 2019 Dec.
Article en En | MEDLINE | ID: mdl-31523862
Typical lead-based perovskites solar cells show an onset of photogeneration around 800 nm, leaving plenty of spectral loss in the near-infrared (NIR). Extending light absorption beyond 800 nm into the NIR should increase photocurrent generation and further improve photovoltaic efficiency of perovskite solar cells (PSCs). Here, a simple and facile approach is reported to incorporate a NIR-chromophore that is also a Lewis-base into perovskite absorbers to broaden their photoresponse and increase their photovoltaic efficiency. Compared with pristine PSCs without such an organic chromophore, these solar cells generate photocurrent in the NIR beyond the band edge of the perovskite active layer alone. Given the Lewis-basic nature of the organic semiconductor, its addition to the photoactive layer also effectively passivates perovskite defects. These films thus exhibit significantly reduced trap densities, enhanced hole and electron mobilities, and suppressed illumination-induced ion migration. As a consequence, perovskite solar cells with organic chromophore exhibit an enhanced efficiency of 21.6%, and substantively improved operational stability under continuous one-sun illumination. The results demonstrate the potential generalizability of directly incorporating a multifunctional organic semiconductor that both extends light absorption and passivates surface traps in perovskite active layers to yield highly efficient and stable NIR-harvesting PSCs.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Adv Mater Asunto de la revista: BIOFISICA / QUIMICA Año: 2019 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Alemania
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Adv Mater Asunto de la revista: BIOFISICA / QUIMICA Año: 2019 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Alemania