Publications by authors named "Andrea R Bowring"

Understanding the formation chemistry of metal halide perovskites is key to optimizing processing conditions and realizing enhanced optoelectronic properties. Here, we reveal the structure of the crystalline precursor in the formation of methylammonium lead iodide (MAPbI) from the single-step deposition of lead chloride and three equivalents of methylammonium iodide (PbCl + 3MAI) (MA = CHNH). The as-spun film consists of crystalline MAPbICl, which is composed of one-dimensional chains of lead halide octahedra, coexisting with disordered MACl.

View Article and Find Full Text PDF
Article Synopsis
  • The study focuses on the thermal stability of two types of mixed cation lead halide perovskites, CsFAPb(IBr) and Cs(MAFA)Pb(IBr).
  • For Cs(MAFA)Pb(IBr), thermal decomposition occurs in two stages, with the first stage happening quickly at low temperatures (below 150 °C).
  • The second stage shows similar rates and activation energy for both compounds, indicating that the first stage primarily involves the MA ion and the second stage involves the FA ion.
View Article and Find Full Text PDF

A sputtered oxide layer enabled by a solution-processed oxide nanoparticle buffer layer to protect underlying layers is used to make semi-transparent perovskite solar cells. Single-junction semi-transparent cells are 12.3% efficient, and mechanically stacked tandems on silicon solar cells are 18.

View Article and Find Full Text PDF

A semiconductor that can be processed on a large scale with a bandgap around 1.8 eV could enable the manufacture of highly efficient low cost double-junction solar cells on crystalline Si. Solution-processable organic-inorganic halide perovskites have recently generated considerable excitement as absorbers in single-junction solar cells, and though it is possible to tune the bandgap of (CH3NH3)Pb(BrxI1-x)3 between 2.

View Article and Find Full Text PDF

We report on reversible, light-induced transformations in (CHNH)Pb(Br I ). Photoluminescence (PL) spectra of these perovskites develop a new, red-shifted peak at 1.68 eV that grows in intensity under constant, 1-sun illumination in less than a minute.

View Article and Find Full Text PDF

Semi-transparent organic photovoltaics are of interest for a variety of photovoltaic applications, including solar windows and hybrid tandem photovoltaics. The figure shows a photograph of our semi-transparent solar cell, which has a power conversion efficiency of 5.0%, with an above bandgap transmission of 34% and a sub-bandgap transmission of 81%.

View Article and Find Full Text PDF

A PHP Error was encountered

Severity: Warning

Message: fopen(/var/lib/php/sessions/ci_sessionuafh8odhhko0ja9bnvhni1sq3pn2oum4): Failed to open stream: No space left on device

Filename: drivers/Session_files_driver.php

Line Number: 177

Backtrace:

File: /var/www/html/index.php
Line: 316
Function: require_once

A PHP Error was encountered

Severity: Warning

Message: session_start(): Failed to read session data: user (path: /var/lib/php/sessions)

Filename: Session/Session.php

Line Number: 137

Backtrace:

File: /var/www/html/index.php
Line: 316
Function: require_once