Recent progress in stabilizing hybrid perovskites for solar cell applications

Abstract

Hybrid inorganic-organic perovskites have quickly evolved as a promising group of materials for solar cells and optoelectronic applications mainly owing to the inexpensive materials, relatively simple and versatile fabrication and high power conversion efficiency (PCE). The certified energy conversion efficiency for perovskite solar cell (PSC) has reached above 20%, which is compatible to the current best for commercial applications. However, long-term stabilities of the materials and devices remain to be the biggest challenging issue for realistic implementation of the PSCs. This article discusses the key issues related to the stability of perovskite absorbing layer including crystal structural stability, chemical stability under moisture, oxygen, illumination and interface reaction, effects of electron-transporting materials (ETM), hole-transporting materials (HTM), contact electrodes and preparation conditions. Towards the end, prospective strategies for improving the stability of PSCs are also briefly discussed and summarized. We focus on recent understanding of the stability of materials and devices and our perspectives about the strategies for the stability improvement.

Perovskite/Silicon Tandem Solar Cells: Marriage of Convenience or True Love Story? – An Overview

“…We will here only shortly summarize some important improvements in cell design and material properties responsible for this promising progress in cell stability. For more in‐depth information on this topic, excellent specific reviews were recently published elsewhere …”

Perovskite Solar Cells: From the Laboratory to the Assembly Line

“…PSC architecture is quite simple in its standard configuration: a conductive glass (or plastic foil) supports an electron extraction layer (like TiO 2 or SnO 2 ), on top of which the perovskite‐active material is deposited. A hole‐transporting material (HTM) is coated above the perovskite layer, and gold back‐contacts are evaporated on the top of the cell . Sunlight absorption leads to charge‐generation, and both negative and positive charge carriers are transported through the perovskite to charge selective contacts.…”

“…PSC architecture is quite simple in its standard configuration:aconductive glass (or plastic foil) supports an electron extraction layer (like TiO 2 or SnO 2 [13] ), on top of which the perovskite-active material is deposited.Ahole-transporting material (HTM) is coated above the perovskite layer,a nd gold backcontactsa re evaporated on the top of the cell. [14][15][16][17] Sunlight absorption leads to charge-generation, and both negative and positivec hargec arriers are transported through the perovskite to charges electivec ontacts.T he core of this device is the perovskitel ayer,b earing ag eneric structure ABX 3 ,i nw hich Ai sa monovalentc ation (like methylammonium CH 3 NH 3 + ,f ormamidinium CH 2 (NH 2 ) 2 + ,C s + ,R b + ), Bs tands for Pb II or Sn II and X for Io rB r. [18] The successo ft his materials is given by its outstanding optoelectronic properties,m erging high absorption coefficient and mobility,l ow exciton binding energy and long balanced carrier diffusion length; [19][20][21][22][23] moreover,t he device can also work in the inverted configuration. [24] Several review articles have been published on strategies to improve the performance of laboratory-scale PSCs.…”

Suppressing X‐Migrations and Enhancing the Phase Stability of Cubic FAPbX3 (X = Br, I)

“…[1][2][3][4] The highest certified perovskite solar cell power conversion efficiency rapidly increased from 3.8% in 2009 to 22.1% in 2016 using hybrid FAPbI 3 doped with 5% MAPbBr 3[5] (and now stands at 24.2% [6] ). [1][2][3][4] The highest certified perovskite solar cell power conversion efficiency rapidly increased from 3.8% in 2009 to 22.1% in 2016 using hybrid FAPbI 3 doped with 5% MAPbBr 3…”